1
Mix together sugar, cake flour, baking powder, baking soda, and salt.
2
Add peanut butter and mix until combined.
3
Add eggs and peanut oil and mix until just combined.
4
Slowly add milk and mix on low speed until just combined.
5
Fill liners 2/3 full and bake for 14 minutes at 350 F. Check for doneness and cool.
For the frosting, beat butter on high, then add peanut butter, salt, and powdered sugar a bit at a time.
6
Frost and enjoy!