01 -
Preheat oven to 350°F (176°C). Line a baking sheet with parchment paper.
02 -
Combine flour, cocoa powder, baking soda, and salt in a bowl. Set aside.
03 -
Cream butter, peanut butter, and sugars until light and fluffy, 2-3 minutes.
04 -
Add egg and vanilla extract, mix until combined.
05 -
Add dry ingredients to wet ingredients, mix until just combined. Do not overmix.
06 -
Stir in peanut butter M&Ms and peanut butter chips.
07 -
Scoop dough into 4 tbsp (60g) balls. Refrigerate 30-45 minutes, until firm.
08 -
Roll dough, add extra M&Ms/chips if desired. Bake 10-12 minutes, edges set.
09 -
Cool on baking sheet 5-7 minutes, then transfer to cooling rack.
10 -
Serve. Store leftovers in airtight container, 3-4 days.