Cookies are great, but whoopie pies are the all-time best after dinner treats! These ones are made with a fluffy buttercream filling sandwiched between soft vanilla cookies, then rolled in sprinkles for a colorful funfetti effect. Use food coloring to tint the filling any shade your heart desires, then enjoy your whoopie pies with a glass of milk to celebrate the best part of the day: dessert.

To make the whoopie pie cookies

1. Preheat oven to 375F. Line 2 baking sheets with parchment paper.
2. In a medium bowl, whisk together flour, baking soda, and salt. Set aside.
3. In the bowl of a stand mixer with a whisk attachment, beat sugar and butter until light, creamy, and fully combined. Add vanilla extract and egg. Beat again until well combined.
4. Add the flour mixture and whole milk in 4-5 additions, alternating between the two and beating after each addition.
5. Using a standard cookie scoop or spoon, drop batter by the tablespoonful onto lined baking sheets (you should end up with 40-50 cookies total). Bake for 9-11 minutes until edges are golden-brown, then let cookies cool completely on the baking sheets while you make the filling.

To make the whoopie pie filling

1. In the bowl of a stand mixer with a whisk attachment, beat the butter until light and creamy. On medium low speed, mix in powdered sugar one cup at a time. Add vanilla and beat until combined.
2. Starting with 2 tablespoons, add milk until desired consistency is achieved. Frosting should be easy to pipe but still able to hold its shape.
3. Add the food coloring of your choice and beat until frosting is your desired color. Transfer to a piping bag fitted with a round tip or a zip-top bag with one of the corners cut.
4. Once cookies have cooled, pipe frosting onto the flat side of one cookie, then place another cookie on top to complete the whoopie pie. Carefully roll the edges of frosting in sprinkles, then repeat with the remaining cookies and filling.
5. Place whoopie pies in an airtight container until it's time to serve!