Peanut Butter Cupcakes with Dark Chocolate Frosting

low speed after each addition. Add more powdered sugar if frosting is too dark. Add a pinch of salt if frosting is too sweet. Frost cooled cupcakes as desired. I used Wilton tip 12 to pipe my frosting.
Cupcakes stay fresh at room temperature in an airtight container for up to 4 days. Store covered in the refrigerator is desired for up to 1 week. I recommend a cupcake carrier for storing and transporting decorated cupcakes.