1 ounce bittersweet or semisweet chocolate, finely chopped
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1/2 cup unsalted butter, softened to room temperature
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1 cup sugar
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2 eggs
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2 teaspoons vanilla
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3/4 cup buttermilk
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20 chocolate sandwich cookies
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20 mini peanut butter cups, unwrapped
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Preheat the oven to 350 degrees. Line 20 muffin cups with paper liners. Place an oreo in the bottom of each liner.
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Sift the flour, cocoa powder, baking soda, baking powder, and salt into a medium bowl. Stir in the chopped chocolate.
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In a large bowl or the bowl of stand mixer, beat the butter and sugar on high until fluffy, about 2-3 minutes. Beat in the eggs one at a time, scraping down the bowl after each addition. Beat in the vanilla. With the mixer on low, slowly pour in the
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Pour in the flour mixture and beat on medium until fully incorporated, about 1 minute. Divide the batter evenly among the paper liners, filling each about 2/3 full.
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Bake for 8 minutes, then remove from oven and press a peanut butter cup into the center of each cupcake. Allow to bake for 10 more minutes, or until a toothpick inserted near the center comes out clean. Allow to cool for 5 minutes, then remove cupcak