Cake Mix Whoopie Pies

4.50 from 14 votes

Cake Mix Whoopie Pies have soft, pillowy cookies surrounding a smooth and creamy buttercream. They're perfect for birthday parties, bake sales and everyday baking!

Prep Time20

Cook Time13

Cool & Assemble Time30

Total Time1 3

Course: Dessert

Keyword: Whoopie Pies

Servings: Whoopie Pies

Calories: 356kcal

Author: Kelsey Byrnes

Ingredients

1 15.25-ounce box cake mix
1 3.4-ounce box instant pudding mix
2/3 cup water
1/2 cup vegetable oil
3 eggs

Filling

3/4 cup salted butter (1 1/2 sticks), softened
3 cups powdered sugar
1 teaspoon vanilla extract
1 cup marshmallow creme

Instructions

Make the Cookies

Pre-heat oven to 350°F. Line baking sheets with parchment paper or silicone baking mats.
In a large bowl (or the bowl of a stand mixer), add the cake mix, pudding mix, water, oil and eggs.
Stir to combine then use a rubber spatula to get the ingredients off the sides of the bowl. Then beat for 2 minutes.
Scoop the batter onto the prepared baking sheet, making sure to put at least 2 inches between each cookie (I use a 2 tbsp cookie scoop).
Bake for 10-13 minutes. Let cool completely.

Make the Filling

Place the softened butter in the bowl of a stand mixer. Beat until smooth.
Add the powdered sugar and vanilla and beat until smooth.
Stir in the marshmallow creme and refrigerate until you're ready to assemble the whoopie pies.

Assemble & Enjoy!

Lay half of the cookies upside-down (so the flat side of the cookie is on top).
Use a piping bag or a cookie scoop to transfer the filling onto the cookie halves.
Place the remaining cookies on top to form the whoopie pies.

Video

Notes

NOTE: The video shows 1/3 cup of flour being added to the batter....disregard this. As boxed cake mixes vary in size, I recommend testing one or two cookies first before scooping all of the batter out onto cookie sheets. That way, if the cookies seem flat, you can add some flour to boost them up a bit!

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