Grasshopper Cake

  • Level: Easy
  • Total: 2 hr 40 min
  • Prep: 1 hr 40 min
  • Cook: 1 hr
  • Yield: 8 to 10 servings
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Ingredients

For the filling: 

1 1/2 cups whole milk

1/2 cup granulated sugar

3 tablespoons cornstarch

3/4 teaspoon peppermint extract

1 large egg, plus 1 egg yolk

3 ounces white chocolate, finely chopped

1 to 2 drops green food coloring

3 tablespoons mini chocolate chips, plus more for topping

For the topping:

1 1/2 cups cold heavy cream

1 tablespoon confectioners' sugar

1/8 teaspoon peppermint extract

For the cake:

Basic Chocolate Cake, recipe follows, baked and cooled

Basic Chocolate Cake:

Cooking spray

1 cup unsweetened cocoa powder (natural or Dutch process)

2 1/2 cups all-purpose flour

2 cups sugar

1 1/2 teaspoons baking powder

1 teaspoon baking soda

1 teaspoon salt

3 large eggs, at room temperature

3/4 cup vegetable oil

1/2 cup sour cream

2 teaspoons vanilla extract

Directions

  1. Make the filling: Bring the milk to a simmer in a medium saucepan over medium heat. Whisk the granulated sugar, cornstarch, peppermint extract, egg and egg yolk in a medium heatproof bowl until smooth. Gradually whisk half of the hot milk into the sugar mixture, then return to the pan with the remaining milk. Reduce the heat to medium low and cook, whisking constantly, until the mixture boils and thickens, 2 to 3 minutes. Transfer to a bowl (strain through a fine-mesh sieve if it looks lumpy), then stir in the white chocolate and green food coloring until the chocolate melts. Press plastic wrap directly onto the surface and refrigerate until cold, at least 1 hour. Stir in the chocolate chips.
  2. Make the topping: Beat the heavy cream, confectioners' sugar and peppermint extract in a bowl with a mixer on medium speed until medium peaks form, 1 to 2 minutes. 
  3. Assemble the cake: Put 1 cake layer on a platter; spread the filling on top, stopping 1/2 inch from the edge. Top with the second cake layer and press down gently. Top with the whipped cream and chocolate chips. 

Basic Chocolate Cake:

  1. Preheat the oven to 350 degrees F. Coat two 9-inch-round cake pans with cooking spray and line the bottoms with parchment paper.
  2. Whisk the cocoa powder and 1 1/2 cups boiling water in a medium bowl until smooth; set aside. Whisk the flour, sugar, baking powder, baking soda and salt in a large bowl until combined. Add the eggs, vegetable oil, sour cream and vanilla and beat with a mixer on medium speed until smooth, about 1 minute. Reduce the mixer speed to low; beat in the cocoa mixture in a steady stream until just combined, then finish mixing with a rubber spatula. (The batter will be thin.)
  3. Divide the batter between the prepared pans and tap the pans against the counter to help the batter settle. Bake until a toothpick inserted into the middle comes out clean, 30 to 40 minutes. Transfer to racks and let cool 10 minutes, then run a knife around the edge of the pans and turn the cakes out onto the racks to cool completely. Remove the parchment. Trim the tops of the cakes with a long serrated knife to make them level, if desired.
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