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Christmas Funfetti Sheet Cake with Cream Cheese Frosting – Soft, Festive & Extra Fluffy

This Christmas Funfetti Sheet Cake with Cream Cheese Frosting is everything joyful about the holiday season—soft, fluffy vanilla cake filled with red and green sprinkles, topped with silky cream cheese frosting and extra Christmas funfetti on top. It's easy to make, gorgeous to serve, and perfect for parties, potlucks, cookie exchanges, school events, or cozy December gatherings. Each slice delivers sweet vanilla flavor, tender crumb, creamy frosting, and festive color. If you want a Christmas dessert that is simple yet stunning, this sheet cake is a guaranteed holiday hit!
Print Recipe Pin Recipe
Prep Time 15 minutes
bake & Cooling + Frosting time 1 hour
Total Time 1 hour 15 minutes
Servings: 18 pieces
Ingredients Equipment Method Notes

Ingredients
  

For the Funfetti Sheet Cake
  • 2 1/4 cups All-purpose flour
  • 1 1/2 cups Granulated sugar
  • 1 tablespoon Baking powder
  • 1/2 teaspoon Baking soda
  • 1/2 teaspoon Salt
  • 1 cup Whole milk
  • 1/2 cup Vegetable oil
  • 1/2 cup Unsalted butter melted
  • 3 Large eggs
  • 1 tablespoon Vanilla extract
  • 1 teaspoon Almond extract optional but festive
  • 1/2 cup Sour cream
  • 3/4 cup Christmas sprinkles red, green, white — “jimmies” only
For the Cream Cheese Frosting
  • 8 oz Cream cheese softened
  • 1/2 cup Unsalted butter softened
  • 3 1/2 cups Powdered sugar
  • 2 teaspoons Vanilla extract
  • 1 –2 tablespoons Heavy cream or milk
  • 1 pinch Salt
For Decorating
  • Extra Christmas sprinkles
  • Optional red & green sanding sugar
  • Small edible pearls

✨ Kitchen Essentials You’ll Love

Quick picks I trust for better results, faster prep, and easier cleanup.

  • 🍳

    Lodge Seasoned Cast Iron Skillet

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  • ⚡

    Instant Pot Duo Plus 9-in-1 Electric

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  • 🔥

    CHEFMAN Digital Air Fryer XL 10L

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Disclosure: As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.

Equipment

  • Mixing bowls
  • Electric mixer or whisk
  • 9×13 baking pan
  • Rubber spatula
  • Measuring cups & spoons
  • Cooling rack
  • Offset spatula (for frosting)
  • Sifter (optional)

Method
 

  1. 🔹 PART 1 — MAKE THE FUNFETTI SHEET CAKE
Step 1 — Preheat & Prepare Pan
  1. Preheat oven to 350°F (175°C).
  2. Grease a 9×13 baking pan.
  3. Line the bottom with parchment if desired.
Step 2 — Mix Dry Ingredients
  1. In a mixing bowl whisk together:
  2. Flour
  3. Baking powder
  4. Baking soda
  5. Salt
  6. Granulated sugar
  7. Set aside.
Step 3 — Whisk Wet Ingredients
  1. In another bowl combine:
  2. Whole milk
  3. Melted butter
  4. Vegetable oil
  5. Eggs
  6. Vanilla extract
  7. Almond extract (optional)
  8. Sour cream
  9. Whisk until smooth and pale.
Step 4 — Combine Wet & Dry
  1. Pour wet mixture into dry ingredients.
  2. Mix gently until batter is smooth and thick.
  3. Do NOT overmix.
Step 5 — Add Sprinkles
  1. Gently fold in Christmas sprinkles.
  2. Use only "jimmies" (long sprinkles) to prevent color bleeding.
Step 6 — Pour Batter Into Pan
  1. Spread evenly using a spatula.
  2. Smooth the top.
Step 7 — Bake
  1. Bake for 26–32 minutes.
  2. A toothpick should come out clean.
  3. Edges lightly golden, center soft but set.
Step 8 — Cool Completely
  1. Place pan on cooling rack.
  2. Let cake cool fully before frosting.
  3. 🔹 PART 2 — MAKE THE CREAM CHEESE FROSTING
Step 9 — Beat Butter & Cream Cheese
  1. Add softened butter and cream cheese to a bowl.
  2. Beat until creamy and smooth.
Step 10 — Add Powdered Sugar
  1. Add powdered sugar gradually.
  2. Mix until thick and fluffy.
Step 11 — Add Liquids
  1. Add vanilla extract.
  2. Add salt.
  3. Add 1–2 tablespoons heavy cream to adjust consistency.
  4. Beat until frosting is silky smooth.
  5. 🔹 PART 3 — ASSEMBLE THE CAKE
Step 12 — Frost the Cake
  1. Spread frosting over completely cooled cake.
  2. Use an offset spatula to smooth the top.
Step 13 — Decorate
  1. Add extra Christmas sprinkles.
  2. Add red & green sanding sugar.
  3. Add edible pearls for holiday sparkle.
Step 14 — Slice & Serve
  1. Cut into squares.
  2. Serve chilled or room temperature.

Notes

🧊 Storage & Reheating
Room Temperature
Up to 12 hours (because of cream cheese frosting).
Refrigerator
Store covered for 4–5 days.
Freezer
Freeze unfrosted cake up to 2 months.
Frost after thawing.
Reheating
Not needed. Serve chilled or at room temperature.
🥄 Variations
1. Chocolate Funfetti Christmas Cake
Replace 1/3 cup flour with cocoa powder.
2. Peppermint Funfetti Sheet Cake
Add peppermint extract (alcohol-free).
3. Gingerbread Funfetti Cake
Add cinnamon + ginger for warm spice.
4. Red Velvet Funfetti Cake
Add red food coloring + sprinkles.
5. Cream Cheese Holiday Swirl Cake
Swirl in sweetened cream cheese before baking.
6. Nut-Free
This recipe is naturally nut-free.
❓ 10 FAQs
1. Why did my sprinkles melt?
Use "jimmies" sprinkles — not nonpareils.
2. Can I use butter instead of oil?
Cake stays softer with a mix of both.
3. Can I make this the night before?
Yes — cover and refrigerate.
4. Why is my cake dense?
Overmixing the batter can remove air.
5. Can I double the recipe?
Yes — use a large sheet pan.
6. Can I use low-fat milk?
Whole milk makes cake softer and richer.
7. Can I skip sour cream?
Greek yogurt works perfectly.
8. Why is the frosting too loose?
Add more powdered sugar (2–3 tablespoons).
9. Can I pipe decorations on top?
Yes — cream cheese frosting pipes beautifully when chilled.
10. Can kids eat this cake?
Absolutely — no alcohol, kid-friendly.
🏁 Conclusion
This Christmas Funfetti Sheet Cake with Cream Cheese Frosting is the perfect mix of festive flavor, soft fluffy cake, and sweet creamy topping. Packed with colorful sprinkles and holiday cheer, it’s simple enough for beginners but impressive enough for Christmas parties and celebrations. Each slice is moist, bright, sweet, and irresistible — a true holiday crowd-pleaser that will instantly become part of your Christmas dessert tradition!