|Brown sugar||1 Cup (16 tbs)|
|Peanut butter||1⁄2 Cup (8 tbs) (chunky)|
|Butter||2 Tablespoon, softened|
|Peanuts||1 Cup (16 tbs)|
Place all ingredients except peanuts in a 1-quart casserole.
Microwave 1 to 2 minutes; stir.
Microwave 1 more minute, until mixture boils.
Add peanuts and spread on cake.
Enough to frost a 1-layer cake.