12 Make-Ahead Thanksgiving Sides You Can Freeze Right Now

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Yes — you can absolutely make your Thanksgiving sides ahead of time and freeze them. These 12 make ahead Thanksgiving sides are all freezer-friendly, so you can cook in the calm weeks before the holiday and simply thaw and reheat on the big day. No more 6 a.m. mashed potato marathons while the turkey hogs the oven.

Every recipe below serves 4 (double or triple for a crowd), with exact freezing and reheating instructions so everything tastes fresh-baked on Thanksgiving Day.

What You’ll Need

• Gallon freezer bags — the workhorse of freezer cooking
• Souper Cubes 2-cup freezer trays — perfect portions for soups, breakfasts & sauces

1. Creamy Freezer Mashed Potatoes

The question everyone asks: can you freeze mashed potatoes? Yes — and they reheat beautifully if you add enough fat. These stay creamy, not grainy.

Ingredients (serves 4):

• 2 lbs Yukon Gold potatoes, peeled and quartered
• 4 tbsp unsalted butter
• 4 oz cream cheese, softened
• 1/3 cup whole milk, warmed
• 1 tsp kosher salt
• 1/2 tsp black pepper

To freeze: Mash the potatoes while hot with butter, cream cheese, warm milk, salt, and pepper until completely smooth. Cool fully, then pack into a freezer bag, press flat (removes air, thaws faster), and freeze up to 3 months at 0°F.

To cook: Thaw overnight in the refrigerator. Transfer to a saucepan over medium-low heat, stirring in a splash of milk until creamy and heated through (about 10 minutes). Or reheat covered in a 350°F oven for 25–30 minutes, stirring once.

Tip: Yukon Golds freeze better than Russets — their waxy texture stays smooth after thawing.

2. Make-Ahead Green Bean Casserole (Freeze Before Baking)

The classic, minus the day-of stress. Assemble it fully, freeze unbaked, and bake from thawed on Thanksgiving.

Ingredients (serves 4):

• 1 lb fresh green beans, trimmed and halved
• 1 can (10.5 oz) cream of mushroom soup
• 1/2 cup milk
• 1 tsp soy sauce
• 1/4 tsp black pepper
• 1 1/3 cups crispy fried onions, divided

To freeze: Blanch green beans in boiling salted water for 4 minutes, then plunge into ice water and drain well (pat dry — excess water makes it soggy). Stir soup, milk, soy sauce, pepper, and 2/3 cup fried onions together, fold in beans, and spread into a greased 8×8-inch freezer-safe baking dish. Wrap tightly in plastic wrap, then foil. Freeze up to 2 months at 0°F. Pack the remaining fried onions separately in a zip bag (do not freeze the topping on the casserole).

To cook: Thaw overnight in the refrigerator. Bake uncovered at 350°F for 25 minutes, top with reserved fried onions, and bake 5 more minutes until bubbly and golden.

Tip: Fresh beans hold up far better than canned after freezing — worth the extra 4 minutes of blanching.

3. Sweet Potato Casserole with Pecan Streusel

Sweet, buttery, and crowned with crunch — this one was born to be frozen.

Ingredients (serves 4):

• 2 lbs sweet potatoes (about 3 large)
• 1/4 cup unsalted butter, melted
• 1/4 cup brown sugar
• 1/4 cup milk
• 1 large egg, beaten
• 1 tsp vanilla extract
• 1/2 tsp cinnamon
• 1/4 tsp salt
• *Streusel:* 1/3 cup chopped pecans, 1/4 cup brown sugar, 2 tbsp flour, 2 tbsp cold butter, cubed

To freeze: Roast sweet potatoes at 400°F for 45–50 minutes until soft; scoop flesh into a bowl. Mash with melted butter, brown sugar, milk, egg, vanilla, cinnamon, and salt. Spread into a greased 8×8-inch freezer-safe dish. Mix streusel ingredients with a fork until crumbly and sprinkle over the top. Wrap tightly (plastic wrap, then foil) and freeze up to 3 months at 0°F.

To cook: Thaw overnight in the refrigerator. Bake uncovered at 350°F for 25–30 minutes until the streusel is crisp and the center is hot.

Tip: Roasting instead of boiling the sweet potatoes keeps them from getting watery after thawing.

4. Cornbread Dressing

Savory, herby, and sturdy — dressing is one of the best Thanksgiving sides to freeze because the bread soaks up flavor as it thaws.

Ingredients (serves 4):

• 6 cups cubed day-old cornbread (about 1 skillet)
• 1/2 cup unsalted butter
• 1 medium onion, diced
• 2 celery stalks, diced
• 1 1/2 cups low-sodium chicken broth
• 1 large egg, beaten
• 1 tsp poultry seasoning
• 1/2 tsp dried sage
• 1 tsp kosher salt
• 1/2 tsp black pepper

To freeze: Sauté onion and celery in butter until soft (8 minutes). Toss with cornbread cubes, then pour over the broth whisked with egg, poultry seasoning, sage, salt, and pepper. Pack into a greased 8×8-inch freezer-safe dish, press gently, wrap tightly, and freeze up to 3 months at 0°F.

To cook: Thaw overnight in the refrigerator. Bake uncovered at 350°F for 30–35 minutes until the top is crisp and golden.

Tip: Slightly stale cornbread absorbs broth without turning to mush — bake it a day ahead on purpose.

5. Buttery Dinner Rolls (Bake-From-Frozen)

Fresh-baked rolls with zero day-of work. Shape them, freeze the dough, and bake straight from frozen.

Ingredients (makes 12 rolls, serves 4–6):

• 1 cup warm milk (110°F)
• 2 1/4 tsp active dry yeast (1 packet)
• 1/4 cup sugar
• 1/3 cup unsalted butter, melted, plus more for brushing
• 1 large egg
• 1 tsp salt
• 3 1/2 cups all-purpose flour

To freeze: Dissolve yeast and a pinch of sugar in warm milk; rest 5 minutes until foamy. Stir in sugar, melted butter, egg, salt, then flour to form a soft dough. Knead 8 minutes, rise 1 hour until doubled. Punch down, divide into 12 balls, and place in a greased 9×13-inch pan. Instead of the second rise, cover tightly and freeze up to 1 month at 0°F.

To cook: No thawing needed. Place the frozen pan in a cold oven, set to 350°F, and bake 30–35 minutes until deeply golden. Brush with melted butter.

Tip: Baking from frozen in a cold oven gives the rolls their second rise as the oven heats — clever and foolproof.

6. Make-Ahead Turkey Gravy

Gravy is the #1 Thanksgiving stressor — and it freezes like a dream. Make it now with wings or drippings.

Ingredients (makes 4 cups):

• 1/2 cup unsalted butter
• 1/2 cup all-purpose flour
• 4 cups low-sodium turkey or chicken broth, warmed
• 1 tsp poultry seasoning
• Salt and black pepper to taste

To freeze: Melt butter, whisk in flour, and cook 2 minutes until golden. Slowly whisk in warm broth until smooth; simmer 5 minutes until thickened. Season, cool completely, and pour into freezer bags or containers, leaving 1 inch of headspace. Freeze up to 3 months at 0°F.

To cook: Thaw overnight in the refrigerator. Warm in a saucepan over medium heat, whisking (add a splash of broth if too thick). If it separates slightly, a vigorous whisk brings it right back.

Tip: Freeze in 1-cup portions so you can thaw exactly what you need — no waste.

7. Cranberry Sauce (The Easiest Freezer Win)

Five ingredients, fifteen minutes, and it freezes perfectly. Never buy the can again.

Ingredients (makes 2 cups):

• 12 oz fresh cranberries
• 1 cup sugar
• 1 cup water
• 1 strip orange peel
• 1 cinnamon stick

To freeze: Simmer everything in a saucepan over medium heat for 12–15 minutes until the berries burst and the sauce thickens. Remove orange peel and cinnamon stick, cool completely, and freeze in a container or bag up to 3 months at 0°F.

To cook: Thaw overnight in the refrigerator and serve cold or at room temperature — no reheating needed.

Tip: It thickens as it cools, so pull it off the heat when it still looks slightly loose.

8. Roasted Garlic Parmesan Brussels Sprouts (Blanch-and-Freeze)

Blanch now, roast later — you get caramelized edges with 10 minutes of Thanksgiving-day effort.

Ingredients (serves 4):

• 1 1/2 lbs Brussels sprouts, halved
• 3 tbsp olive oil
• 4 garlic cloves, minced
• 1/2 tsp salt
• 1/4 tsp black pepper
• 1/3 cup grated Parmesan

To freeze: Blanch halved sprouts in boiling salted water for 3 minutes, ice-bath, and drain very well (pat dry). Toss with olive oil, garlic, salt, and pepper. Spread on a sheet pan, flash-freeze 1 hour, then transfer to a freezer bag. Freeze up to 3 months at 0°F. Keep Parmesan separate.

To cook: Roast from frozen at 425°F for 20–25 minutes, flipping once, until crispy-edged. Shower with Parmesan in the last 2 minutes.

Tip: The flash-freeze step keeps the sprouts from clumping into one icy brick.

9. Butternut Squash Casserole

Creamy, lightly sweet, and sturdy enough to freeze — a quiet hero of the holiday table.

Ingredients (serves 4):

• 1 large butternut squash (about 2 1/2 lbs), peeled and cubed
• 2 tbsp butter
• 1/4 cup brown sugar
• 1/4 cup half-and-half
• 1/2 tsp cinnamon
• 1/4 tsp nutmeg
• 1/2 tsp salt

To freeze: Roast squash cubes tossed with a drizzle of oil at 400°F for 30 minutes until tender. Mash with butter, brown sugar, half-and-half, cinnamon, nutmeg, and salt. Pack into a greased freezer-safe dish, wrap tightly, and freeze up to 3 months at 0°F.

To cook: Thaw overnight in the refrigerator. Bake uncovered at 350°F for 20–25 minutes until hot through.

Tip: Roasting concentrates the squash’s sweetness — boiling makes it watery after thawing.

10. Baked Mac and Cheese (Freeze Before the Final Bake)

Creamy inside, crunchy on top — assemble it now, bake it on the day.

Ingredients (serves 4):

• 8 oz elbow macaroni
• 3 tbsp butter
• 3 tbsp flour
• 2 cups whole milk, warmed
• 2 cups shredded sharp cheddar
• 1/2 cup shredded Gruyère or Monterey Jack
• 1/2 tsp mustard powder
• 1/2 tsp salt
• 1/4 tsp black pepper
• 1/2 cup panko breadcrumbs + 1 tbsp melted butter (topping)

To freeze: Cook macaroni 2 minutes shy of package directions; drain. Make a roux with butter and flour, whisk in warm milk until thickened, then melt in the cheeses, mustard powder, salt, and pepper. Fold in pasta, spread into a greased 8×8-inch freezer-safe dish, and cool. Top with buttered panko, wrap tightly, and freeze up to 2 months at 0°F.

To cook: Thaw overnight in the refrigerator. Bake uncovered at 350°F for 30–35 minutes until bubbly and golden on top.

Tip: Undercooking the pasta slightly is the secret — it finishes in the oven instead of going mushy.

11. Honey-Glazed Roasted Root Vegetables

Carrots, parsnips, and sweet potatoes roasted with honey — simple, colorful, and freezer-friendly.

Ingredients (serves 4):

• 3 large carrots, cut into 2-inch pieces
• 2 parsnips, cut into 2-inch pieces
• 1 large sweet potato, cubed
• 3 tbsp olive oil
• 2 tbsp honey
• 1 tsp fresh thyme leaves (or 1/2 tsp dried)
• 3/4 tsp salt
• 1/4 tsp black pepper

To freeze: Toss vegetables with olive oil, honey, thyme, salt, and pepper. Roast at 425°F for 25 minutes until just tender with caramelized edges — slightly underdone. Cool, flash-freeze on a sheet pan for 1 hour, then bag. Freeze up to 3 months at 0°F.

To cook: Roast from frozen at 425°F for 15–18 minutes until heated through and re-crisped at the edges.

Tip: Cut everything the same size so it cooks evenly — the parsnips especially like to race ahead.

12. Creamed Corn Casserole

Some call it corn pudding — everyone calls it gone in minutes. Freezes beautifully.

Ingredients (serves 4):

• 2 cans (15 oz each) creamed corn
• 1 can (15 oz) whole kernel corn, drained
• 1 box (8.5 oz) corn muffin mix
• 1/2 cup sour cream
• 1/4 cup butter, melted
• 1 large egg, beaten

To freeze: Stir everything together and spread into a greased 8×8-inch freezer-safe dish. Wrap tightly and freeze unbaked up to 2 months at 0°F.

To cook: Thaw overnight in the refrigerator. Bake uncovered at 350°F for 40–45 minutes until set and golden at the edges.

Tip: A knife inserted in the center should come out clean — that’s how you know it’s set.

How Long Do These Keep?

Most of these make ahead Thanksgiving sides keep 2–3 months in the freezer at 0°F without quality loss — check each recipe above for its exact window. A few rules that apply to all of them:

• Cool completely before wrapping. Warm food creates condensation, and condensation becomes ice crystals.
• Wrap twice. Plastic wrap pressed directly on the food, then foil or a freezer bag with the air pressed out. Air is the enemy.
• Label everything with the dish name and date. Frozen casseroles all look alike in January.
• Thaw safely. Move dishes to the refrigerator the night before — never thaw on the counter. Most casseroles need a full 24 hours in the fridge.
• Reheat to steaming. Casseroles should hit 165°F in the center; a quick check with a food thermometer takes 5 seconds and guarantees food safety.

FAQ

Can you freeze mashed potatoes for Thanksgiving?

Yes — mashed potatoes freeze very well for up to 3 months. The key is adding enough fat (butter + cream cheese) before freezing, which keeps them creamy instead of grainy when reheated. Thaw overnight in the fridge and reheat gently with a splash of milk.

What Thanksgiving sides can you make ahead and freeze?

Mashed potatoes, green bean casserole (unbaked), sweet potato casserole, dressing, dinner roll dough, gravy, cranberry sauce, mac and cheese (unbaked), and roasted vegetables all freeze well. Avoid freezing anything with a fresh salad component or whipped cream toppings.

How far in advance can you freeze Thanksgiving sides?

Most sides keep 2–3 months at 0°F, so you can start in late September or October for a late-November Thanksgiving. Gravy, cranberry sauce, and mashed potatoes are at their best within 3 months; casseroles with dairy are best within 2.

Can you freeze green bean casserole before baking?

Yes — assemble it completely but leave off the crispy onion topping, wrap tightly, and freeze up to 2 months. Thaw overnight in the fridge, then bake and add the onions for the last 5 minutes so they stay crisp.

How do you reheat frozen Thanksgiving sides?

Thaw overnight in the refrigerator first (never on the counter). Most casseroles reheat at 350°F for 25–35 minutes until the center reaches 165°F. Gravy and mashed potatoes reheat best on the stovetop over medium-low heat with frequent stirring.

Can you freeze turkey gravy?

Absolutely — gravy freezes perfectly for up to 3 months. Cool it completely, freeze in portion-sized bags or containers leaving headspace, and thaw overnight in the fridge. Whisk while reheating; if it looks separated, keep whisking and it will come back together.

Conclusion

That’s 12 freezer friendly Thanksgiving side dishes you can make ahead — start to finish, your entire side lineup can be sitting in the freezer weeks before the holiday. Imagine Thanksgiving morning with nothing to do but enjoy coffee while the turkey roasts.

📌 Pin this for later — your future self (the calm one, not the 6 a.m. potato-peeling one) will thank you!

Hungry for more make-ahead holiday magic? Check out 7 Holiday Helper Freezer Recipes: Sides You Can Make Weeks Ahead for even more seasonal sides, and The 2-Hour Freezer Prep Session: 10 Dinners, One Shopping List to learn the batch-cooking system that makes all of this possible.