01 - Preheat oven to 350°F and line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together almond flour, cocoa powder, baking powder, and salt until well blended.
03 - In a large bowl, beat softened butter and erythritol until light and fluffy. Add egg and vanilla extract, mixing until fully incorporated.
04 - Gradually add dry ingredients to the wet mixture, stirring until a soft dough forms. Avoid overmixing to maintain tender texture.
05 - Drop rounded spoonfuls of dough (approximately 1 ½ tablespoons each) onto prepared baking sheets, spacing 2 inches apart to allow for spreading.
06 - Place 1 teaspoon of peanut butter on top of each dough mound. Use a toothpick or knife to gently swirl peanut butter into chocolate dough, creating a marbled effect without fully incorporating.
07 - Bake for 10 to 12 minutes until edges are set but centers remain soft. Remove when tops no longer look wet.
08 - Let cookies rest on baking sheet for 10 minutes to firm up, then transfer to wire rack to cool completely before serving.