Giant Whoopie Pie

Giant Whoopie Pie

4.2(148)

Your favorite chocolate cookie sandwich, now in giant form! When transferring the cake batter to the pans, spread a thinner layer toward the edges, keeping the center thicker. The domed tops will replicate the classic whoopie pie shape. After the pillowy cake rounds cool, sandwich with the fluffy marshmallow filling, then slice and serve!

Cook Time
50 minutes
Total Time
1 hr 20 min
Yield
12 servings

How to Make It

1. Step
Preheat the oven to 350˚F (180˚C). Grease and line 2 10-inch (25 cm) round cake pans with parchment paper.
2. Step
Make the whoopie pie: In a large bowl, whisk together the flour, cocoa powder, espresso powder, salt, baking soda, and brown sugar, making sure there are no lumps.
3. Step
Make a well in the center of the dry ingredients, then pour in the water, vinegar, vanilla and oil to the well. Whisk to combine, working slowly to avoid clumps.
4. Step
Scoop 2½ cups (600 g) of batter into the center of each cake pan. Use an offset spatula or a knife to spread the edges of the batter just to the edges of the pans. Do not level the top of the cake, to help create a domed shape.
5. Step
Bake for 30 minutes, or until a toothpick inserted in the center of the cakes comes out clean. Let cool in the pans for 10 minutes, then carefully transfer to a wire rack to cool completely.
6. Step
Make the filling: In a large bowl, combine the butter and marshmallow fluff and cream with an electric hand mixer for 2–3 minutes, until fully combined. Sift in the powdered sugar, then beat for another 2–3 minutes, until light and fluffy. Transfer the filling to a piping bag or zip-top bag. Cut a 2-inch (5 cm) wide opening on a corner.
7. Step
Invert a cake onto a serving platter so the domed side is facing down. Pipe a thick spiral of filling onto the cake, leaving a ¼-inch (½ cm) border around the edge, and smooth with an offset spatula. Place the remaining cake on top of the filling, domed side up, and push down slightly to attach.
8. Step
Slice and serve.
9. Step
Enjoy!

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