This recipe takes an old-school favorite, peanut butter and jelly, and adds it to a classic dessert recipe.
Preheat the oven to 350 degrees. Spray an 8-by-8-inch baking pan with nonstick cooking spray. Line the pan with parchment paper and set aside.
Place the butter, peanut butter, light brown sugar, and sugar into a large mixing bowl. Beat until creamy, about 3 minutes, scraping the bowl down as needed. Mix in the egg and vanilla. Add the flour, baking powder, and salt and blend well.
Press 2/3 of the dough into the prepared pan. Spread the strawberry jam over the dough and then place the cut strawberries over the jam. Crumble the remaining dough over the strawberries. Gently pat down. Sprinkle the peanuts over the top and press them gently into the dough.
Bake for 40 minutes, rotating the pan front to back halfway through. Remove from the oven and cool slightly before serving.