Making the Easy Chocolate Cakes:
1. Get Ready: Preheat your oven to 400°F (200°C). Line two baking sheets with parchment paper or silicone mats – these help prevent spreading for perfectly round whoopie pies!
2. Dry Mix: In a large bowl, whisk together the flour, cocoa powder, baking soda, and salt. Set this aside.
3. Cream It: In a stand mixer, beat the room-temperature butter and both sugars together on medium-high speed until the mixture is light and fluffy, about 3 minutes.
4. Add Wet Ingredients: Add the eggs one at a time, beating well after each. Then, mix in the buttermilk and vanilla until everything is smoothly combined.
5. Combine All: Gradually add the dry flour mixture to the wet ingredients on low speed, mixing just until combined. Scrape down the bowl to ensure no dry spots remain.
6. Scoop & Bake: Using a 1.5 tablespoon cookie scoop (level it off for even sizes), drop about 12 rounds of batter onto each prepared baking sheet.
7. Perfect Pies: Bake for about 8 minutes, rotating the sheets halfway through. The tops should feel gently set and soft to the touch.
8. Cool Down: Let the whoopie cakes cool on the baking sheets for 10 minutes, then carefully transfer them to a wire rack to cool completely. Repeat with any remaining batter, allowing baking sheets to cool between batches.
Whipping Up the Eggless Cookie Dough Filling:
1. Cream Butter & Sugar: In your stand mixer, beat the room-temperature butter and both sugars for about 3 minutes until light and fluffy.
2. Flavor Boost: Mix in the milk and vanilla until well combined.
3. Add Flour: Slowly incorporate the flour on medium speed until the mixture is smooth and well-blended. If it seems a little thick for piping, you can add 1-2 extra tablespoons of milk.
4. Chocolatey Finish: Gently fold in the mini chocolate chips – now you have delicious, eggless cookie dough!
Assembling Your Whoopie Pies:
1. Match & Fill: Once the cakes are completely cool, find similar-sized halves. Scoop about 2 tablespoons of the cookie dough filling onto the flat side of one cake half (a piping bag makes this super easy!).
2. Assemble: Gently place another cake half on top, pressing lightly to create your whoopie pie sandwich.
3. Enjoy or Store: These homemade treats are best enjoyed fresh within 3 days. Store them in an airtight container at room temperature.