- Cooking Time: 10 minutes
- Servings: 24
- Preparation Time: 40 minutes
- For the Graham Cracker Whoopie:
- 1½ cups graham flour
- ¾ cup all-purpose flour
- 1½ teaspoons baking powder
- ½ teaspoon salt
- 4 tablespoons unsalted butter, at room temperature
- 4 tablespoons vegetable shortening
- 1 cup (packed) dark brown sugar
- 2 large eggs
- ½ cup buttermilk
- 2 tablespoons milk
- 1 teaspoon baking soda
- 1 teaspoon white vinegar
- 1 teaspoon vanilla extract
- For the Classic Marshmallow Filling:
- 1½ cups Marshmallow Fluff (or other prepared marshmallow cream, which will do in a pinch)
- 1¼ cups vegetable shortening
- 1 cup confectioners’ sugar
- 1 tablespoon vanilla extract
- For the Chocolate Ganache Filling:
- 8 ounces bittersweet or semisweet chocolate chips (or solid chocolate, finely chopped)
- ½ cup heavy cream
- 1. Position a rack in the center of the oven and preheat the oven to 375 degrees F. Line two baking sheets with parchment paper.
- 2. In a medium bowl, stir together both flours, baking powder, and salt.
- 3. In the work bowl of a stand mixer fitted with the paddle attachment, beat together the butter, shortening and brown sugar until light and creamy, about 3 minutes. Add the eggs and the buttermilk and beat until combined.
- 4. In a measuring cup, combine the milk, baking soda, and vinegar. Add the milk mixture to the batter along with the flour mixture and beat on low speed until just combined. Add the vanilla and beat on medium speed for about 2 minutes, until completely combined.
- 5. Using a spoon, drop about 1 tablespoon of batter onto one of the prepared baking sheets and repeat, spacing them at least 2 inches apart. Bake one sheet at a time for about 10 minutes each, or until the cakes begin to brown. Remove from the oven and let the cakes cool on the sheet for at least 5 minutes before transferring them to a rack to cool completely.
- 6. Make the Marshmallow Filling: In the work bowl of a stand mixer fitted with the paddle attachment, beat together the Marshmallow Fluff and the vegetable shortening, starting on low and increasing to medium speed until the mixture is smooth and fluffy, about 3 minutes. Reduce mixer speed to low, add the confectioners’ sugar and the vanilla, and beat until incorporated. Increase mixer speed to medium and beat until fluffy, about 3 minutes more.
- 7. Make the Chocolate Ganache Filling: Put the chocolate in a large, heatproof bowl. Heat the cream in a large, heavy saucepan over medium heat just until it bubbles. Pour the hot cream over the chocolate in the bowl and let it sit for about 10 minutes, until the chocolate is melted. Stir with a wooden spoon or spatula until smooth. Allow the mixture to rest at room temperature until firm enough to spread, about 2 hours. You may also refrigerate the mixture for about 30 minutes, until it is firm enough to spread, stirring every 10 minutes.
- 8. Assemble the whoopie pies: Pipe or spread (whatever your preferred method) a layer of chocolate ganache filling onto the flat side of one of the cakes. Using the same method, top the chocolate filling with the marshmallow filling. Top it with another cake, flat-side down. Repeat with the rest of the cakes and filling.
NotesA classic nostalgic dessert that is slowly overtaking cupcakes in terms of food trends! This s'mores version is graham-flavored "whoopie pies" filled with marshmallow icing and chocolate ganache. Perfect for summer parties, and no fire needed!
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