Fun Sprinkle Whoopie Pies Recipe with Vanilla Buttercream

Fun Sprinkle Whoopie Pies are soft, chewy vanilla cake sandwiches made with boxed cake mix, rainbow jimmies, and fluffy homemade vanilla buttercream. They take about 20–25 minutes to prepare, bake for 10–12 minutes per tray at 350°F, and make approximately 12–14 delightful sandwich cookies.

Every bite combines tender Funfetti-style cake with rich, creamy vanilla filling and a playful crunch from colorful sprinkles. These easy dessert treats are perfect for birthdays, bake sales, classroom celebrations, holidays, or any afternoon that needs a little extra sweetness.

Why You’ll Love This Recipe

These Fun Sprinkle Whoopie Pies deliver the charm of a decorated bakery cookie without requiring a complicated homemade cake batter. Boxed vanilla, yellow, or Funfetti cake mix creates a dependable base, while two eggs and oil or butter transform it into a scoopable dough.

The finished cakes are soft in the center, lightly golden around the edges, and packed with cheerful color. A generous layer of vanilla buttercream makes each sandwich creamy, sweet, and satisfying without overpowering the delicate cake flavor.

• Easy preparation: The dough comes together in one bowl.
• Festive appearance: Rainbow sprinkles make every pie celebration-ready.
• Flexible presentation: Pipe, spread, or sprinkle the buttercream edges to suit the occasion.

If you enjoy colorful desserts with a homemade feel, you may also like these crumb cake ideas for another cozy sweet treat.

Ingredients You’ll Need

Start with one 15.25–16.25-ounce box of vanilla, yellow, or Funfetti cake mix. Use vegetable oil or melted, cooled unsalted butter, depending on whether you prefer a neutral flavor or a slightly richer butter taste.

Two large eggs give the cake dough structure and tenderness. Add one-third cup of rainbow jimmies, which are the long, soft sprinkles commonly used on cupcakes and cookies.

Plain yellow cake mix benefits from an optional half teaspoon of vanilla extract. If you use vanilla or Funfetti mix, you can skip it, although an extra touch of vanilla is always welcome.

For the filling, gather softened unsalted butter, sifted confectioners’ sugar, vanilla extract, heavy cream or milk, and a pinch of salt. Sifting the sugar helps the buttercream turn smooth and fluffy instead of lumpy.

For another dessert that brings comforting texture to the table, consider pairing these cookies with the cozy flavors in this oatmeal cake.

How to Make It Step-by-Step

Step 1: Heat the oven to 350°F (175°C), then line two baking sheets with parchment paper or silicone baking mats. Preparing both trays before mixing lets you scoop the dough right away and keeps the process organized.

Step 2: Place the cake mix, vegetable oil or melted cooled butter, and eggs in a large bowl. Stir until the mixture becomes a thick, smooth dough, adding the optional vanilla extract if you are using plain yellow cake mix.

Step 3: Fold in the rainbow jimmies with a gentle hand. Stir only until they are distributed, since vigorous mixing can break the sprinkles and cause their colors to bleed into the dough.

Step 4: Scoop rounded tablespoon-sized portions onto the prepared baking sheets, leaving about 2 inches between portions. A small cookie scoop makes matching cake rounds easier, which helps the finished whoopie pies fit together neatly.

Step 5: Bake each tray for 10–12 minutes, watching for tops that look set and edges that are just beginning to brown. The centers should remain soft, so take care not to bake the rounds until they look dry or deeply golden.

Step 6: Let the cakes cool on their baking sheets for about 5 minutes before transferring them to a wire rack. They must cool completely before filling, because warm cake can soften the buttercream and make the sandwiches slide apart.

Step 7: To make the filling, beat the softened butter until creamy. Gradually beat in the sifted confectioners’ sugar, then add the vanilla, salt, and two tablespoons of heavy cream or milk; continue beating for 2–3 minutes until light and fluffy.

Step 8: Pipe or spread buttercream onto the flat side of half the cooled cake rounds. Place the remaining cakes on top and press gently, stopping when the filling reaches the edges without squeezing out too much.

Step 9: For a final party detail, roll the exposed buttercream edges in extra rainbow sprinkles. Arrange the finished pies on a platter and serve at room temperature for the softest bite.

Pro Tips for Soft, Colorful Whoopie Pies

Choose rainbow jimmies instead of nonpareils for the batter. Jimmies hold their color and shape better during mixing and baking, while tiny nonpareils are more likely to dissolve and streak the dough.

Use a cookie scoop for consistent portions, then check the spacing before the tray goes into the oven. If your oven heats unevenly, rotate the baking sheets halfway through baking so the rounds brown evenly.

Butter should be softened but not melted for the filling. Room-temperature butter whips smoothly, while melted butter can create a loose frosting that will not hold a generous layer between the cakes.

Do not rush the cooling stage. Completely cooled rounds produce a cleaner sandwich, preserve the buttercream’s shape, and keep the cake texture pleasantly soft rather than gummy.

For more fruit-forward baking inspiration, save these pear crumble bars for your next dessert spread.

Serving Ideas and Variations

Serve these sprinkle pies on a colorful platter for birthdays, baby showers, school parties, or holiday cookie exchanges. They are especially charming when arranged in paper cupcake liners so guests can pick one up without touching the buttercream.

You can vary the sprinkle colors to match a celebration while keeping the recipe quantities unchanged. Try school colors, pastel jimmies for a shower, or red and green sprinkles for a winter dessert table.

For a pretty finish, pipe the buttercream with a star tip rather than spreading it flat. The ridges catch extra sprinkles and give each sandwich a bakery-style appearance.

These cookies also fit beautifully beside savory party food. For a complete gathering menu, see this holiday cheese board with roasted grapes for a festive appetizer idea.

Storage and Make-Ahead Advice

Place finished whoopie pies in an airtight container and store them at room temperature for up to 2 days. Keep them in a single layer when possible, or separate layers with parchment paper to protect the buttercream and sprinkles.

For longer storage, refrigerate the pies for about 4–5 days. The cakes may firm slightly when chilled, so let them sit briefly at room temperature before serving to bring back their softest texture.

You can prepare the cake rounds ahead and fill them once fully cool. Avoid filling warm rounds, and keep the completed sandwiches covered so they do not absorb refrigerator odors or dry out.

For a seasonal hand-held dessert option to serve alongside these colorful cookies, take a look at these pumpkin hand pies.

Fun Sprinkle Whoopie Pies

Soft sprinkle-studded vanilla cake rounds are sandwiched with fluffy vanilla buttercream for a cheerful, bakery-style dessert. This shortcut recipe makes about 12–14 sandwich cookies.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 10 minutes mins

Total Time 45 minutes mins

Servings: 12 servings

Ingredients Method Notes

Ingredients

  

Cake Rounds

• 1 box (15.25-16.25 ounces) Vanilla, yellow, or Funfetti cake mix
• 1/2 cup (120 ml) Vegetable oil or melted, cooled unsalted butter
• 2 Large eggs
• 1/3 cup Rainbow sprinkles, preferably jimmies
• 1/2 teaspoon Vanilla extract, optional for plain yellow cake mix

Vanilla Filling

• 1/2 cup (113 g) Unsalted butter, softened
• 2 cups (225 g) Confectioners’ sugar, sifted
• 1 teaspoon Vanilla extract
• 2 tablespoons Heavy cream or milk
• 1 pinch Salt

Optional Decoration

• As needed Extra rainbow sprinkles

Method

 

Step-by-Step

1. Heat the oven to 350°F (175°C). Line two baking sheets with parchment paper or silicone baking mats.
2. Stir together the cake mix, oil or melted cooled butter, eggs, and optional vanilla if using plain yellow cake mix until a thick, smooth dough forms. Fold in the rainbow jimmies gently.
3. Scoop rounded tablespoon-sized portions onto the prepared sheets, spacing them about 2 inches apart. A small cookie scoop helps keep the cakes uniform.
4. Bake for 10–12 minutes, until the tops look set and the edges are just beginning to brown. Keep the centers soft and avoid overbaking.
5. Cool the cakes on the baking sheets for about 5 minutes, then transfer them to a rack and cool completely.
6. Beat the softened butter until creamy. Gradually add the sifted confectioners’ sugar, then beat in the vanilla, salt, and cream for 2–3 minutes, adding a little more cream if needed for a fluffy consistency.
7. Pipe or spread filling onto the flat side of half of the cooled cakes. Top with the remaining cakes and press gently until the buttercream reaches the edges.
8. Roll the exposed filling edges in extra rainbow sprinkles if desired. Serve at room temperature for the softest texture.

Notes

Use rainbow jimmies rather than nonpareils because jimmies hold their color and shape better in the dough. Store finished pies in an airtight container at room temperature for up to 2 days or refrigerate for about 4–5 days. Let refrigerated pies sit briefly at room temperature before serving.

Final Thoughts

Fun Sprinkle Whoopie Pies are an easy, joyful dessert with tender vanilla cake, creamy buttercream, and a burst of rainbow color in every bite. The shortcut cake-mix method keeps preparation simple while still giving you a homemade treat that looks special on any dessert table.

Remember the key details: use jimmies, scoop evenly, bake only until the tops are set, and cool the cake rounds completely before filling. Once assembled, add extra sprinkles around the buttercream edges and enjoy these cheerful sandwich cookies with family and friends.