
Ingredients
For the Peanut Butter Cookie Dough:
- 1 3/4 cups all-purpose flour
- 1 tsp baking soda
- 1 tsp salt
- 1/2 cup (1 stick) unsalted butter, softened
- 1/2 cup creamy peanut butter
- 1/2 cup granulated sugar
- 1/2 cup brown sugar, packed
- 1 large egg
- 1 tsp vanilla extract
- 2 tbsp milk
For the Centers:
- 36 mini Reese’s Peanut Butter Cups, unwrapped
- OR 24 regular-sized Reese’s cups, cut in half
Optional Toppings:
- 1/4 cup mini chocolate chips
- 1/4 cup chopped peanuts
- Sea salt flakes
- Melted chocolate for drizzling
Equipment:
- 24-cup mini muffin tin (or two 12-cup tins)
- Cooking spray or mini muffin liners
Instructions

Prepare for Baking:
- Preheat oven to 375°F (190°C).
- Generously spray mini muffin tin with cooking spray, or line with mini paper liners.
- Unwrap all Reese’s peanut butter cups and set aside.
Make the Cookie Dough:
- In a medium bowl, whisk together flour, baking soda, and salt. Set aside.
- In a large bowl, cream together softened butter and peanut butter with an electric mixer until light and fluffy (about 2-3 minutes).
- Add granulated sugar and brown sugar, beat until well combined.
- Beat in egg and vanilla extract until smooth.
- Gradually mix in the flour mixture until just combined.
- Add milk and mix until dough comes together (it should be slightly sticky but manageable).
Assemble the Cookie Cups:
- Scoop about 1 tablespoon of dough into each mini muffin cup.
- Using your fingers or the back of a small spoon, press the dough up the sides of each cup to create a well in the center.
- The dough should come about 2/3 up the sides of each cup.
- Place one mini Reese’s cup (or half of a regular one) into the center of each cookie cup, pressing down gently.
Bake:
- Bake for 8-10 minutes until the edges are lightly golden but centers still look slightly underbaked.
- The Reese’s cups will be soft and slightly melted – this is perfect!
- Remove from oven and let cool in the pan for 10 minutes.
- Carefully remove from muffin tin and place on a wire rack to cool completely.
Optional Finishing Touches:
- While still warm: Sprinkle with mini chocolate chips, chopped peanuts, or sea salt flakes.
- Once cooled: Drizzle with melted chocolate for extra indulgence.
- For extra PB flavor: Brush tops lightly with melted peanut butter.
Storage:
- Room temperature: Store in airtight container for up to 1 week
- Refrigerator: Up to 2 weeks (bring to room temperature before serving)
- Freezer: Freeze for up to 3 months
Pro Tips:
- Don’t overbake: Cookies should still look slightly underbaked when you remove them – they’ll continue cooking as they cool
- Press gently: Don’t press the Reese’s cups too hard or they’ll sink to the bottom
- Spray well: Make sure muffin tin is well-greased to prevent sticking
- Room temperature ingredients: Ensures smooth mixing and even baking
- Size consistency: Use a cookie scoop for evenly sized portions
Variations:
- Chocolate Cookie Cups: Replace 1/4 cup flour with cocoa powder
- Double Chocolate: Add 1/4 cup mini chocolate chips to the dough
- White Chocolate: Use white chocolate Reese’s cups
- Crunchy: Use crunchy peanut butter instead of creamy
- Holiday Versions: Use seasonal Reese’s shapes (trees, pumpkins, hearts)
- Nutella Centers: Replace Reese’s with a spoonful of Nutella
Troubleshooting:
- Cookies sticking: Make sure to spray muffin tin generously or use liners
- Reese’s sinking: Press cookie dough higher up the sides to create a better well
- Dry cookies: Don’t overbake – they should still look slightly underdone
- Cracking: Let cool in pan for full 10 minutes before removing
Make-Ahead Tips:
- Dough: Can be made 2 days ahead and refrigerated
- Baked cookies: Best eaten same day but store well for several days
- Freezing: Freeze baked cookies in airtight container, thaw at room temperature
Serving Suggestions:
- Serve with a glass of cold milk
- Perfect for bake sales, parties, or lunch boxes
- Great for gifting – pack in decorative tins
- Serve slightly warmed for extra gooey centers
Yield: 24 mini cookie cups
Prep Time: 20 minutes
Bake Time: 10 minutes
Cool Time: 15 minutes
Total Time: 45 minutes