01 -
Beat butter and sugars until light, then mix in egg, peanut butter, and vanilla.
02 -
Mix in flour, baking soda, and salt until well combined.
03 -
Cover and refrigerate dough for at least 1 hour.
04 -
Heat oven to 325°F and grease mini muffin pans.
05 -
Roll dough into balls, place in pan, make indent in center.
06 -
Cook for 14-15 minutes until edges are lightly brown.
07 -
Press centers again while warm, then cool completely.
08 -
Melt chocolate with oil, fold in mascarpone until smooth.
09 -
Spoon filling into cooled cups, top with nuts if desired.