For the Peanut Butter Cookies:

½ cup unsalted butter, softened

½ cup granulated sugar

½ cup light brown sugar

1 large egg

1 teaspoon vanilla extract

½ cup creamy peanut butter

1½ cups all-purpose flour

1 teaspoon baking powder (or ½ teaspoon baking soda)

¼ teaspoon salt

For the Chocolate or Ganache Topping:

1 cup milk or semi-sweet chocolate chips

2–3 tablespoons heavy cream or 1 tablespoon neutral oil

Optional Garnish:

½–1 cup Muddy Buddy snack mix or similar coated cereal

Powdered sugar, for dusting

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Preheat oven to 350°F (175°C) and line baking sheets with parchment paper.
Cream butter, granulated sugar, and brown sugar until light and fluffy. Mix in egg, vanilla, and peanut butter until smooth.
Whisk together flour, baking powder (or soda), and salt in a separate bowl. Gradually mix into wet ingredients until combined.
Scoop dough into balls and place on prepared baking sheets. Bake 9–12 minutes, until tops are matte and puffy.
While still warm, gently flatten each cookie with the bottom of a glass to create a small well in the center. Cool completely.
Melt chocolate chips with heavy cream or oil until smooth. Spoon into cookie wells and let set at room temperature or chill briefly.
Dust with powdered sugar and top with Muddy Buddy pieces if desired.