2 cups all-purpose flour
1/2 cup cocoa powder
1/2 teaspoon baking powder
1/2 teaspoon baking soda
1/4 pound (1 stick) unsalted butter, room temperature
1/2 cup solid vegetable shortening
1/2 cup granulated sugar
1 1/4 cups firmly packed light-brown sugar
2 large eggs
1 teaspoon pure vanilla extract
1 cup semi-sweet chocolate chips
1/2 cup creamy peanut butter
Preheat oven to 350 degrees. Line two baking sheets with nonstick baking mats
Sift together flour, cocoa powder, baking powder, and baking soda, and set aside. In the bowl of use mixer to beat butter, vegetable shortening, granulated sugar, and 1 cup brown sugar on medium speed until light and fluffy, about 2 minutes.
Add eggs, one at a time, mixing until fully combined between additions. Add vanilla; beat to combine. Gradually add dry ingredients; mix on low speed until fully combined. Add chocolate chips; mix on low just until combined.
Cover bowl with plastic wrap; chill until firm, about 1 hour.
In a small bowl using a rubber spatula, stir together peanut butter and remaining 1/4 cup brown sugar. Drop 1 tablespoon of dough at a time onto baking sheets, spacing cookies about 2 inches apart. Make a thumbprint in the center of each cookie. Fill thumbprint with 1 teaspoon peanut butter mixture. Top with a second tablespoon of flattened dough. Carefully mold dough to cover the surprise. Bake until firm, about 12 minutes, rotating halfway through. Transfer baking sheets to wire racks to cool for 5 minutes. Remove cookies from baking sheets, and let cool completely on wire racks. Yields 4 dozen cookies
Compliments of Martha Stewart