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Export 5 ingredients for grocery delivery
Step 1
Spray the inside of a microwave-safe mug with non-stick cooking spray (be liberal about it!).
Step 2
Crack an egg into the mug, add the brownie mix, fill the remaining space in the mug with whipped cream- about 1/2-2/3 of a cup.
Step 3
Mix with a fork until completely blended. Add a generous dollop of peanut butter to the batter, about a rounded tablespoon.
Step 4
Microwave on high for 1 minute, 10 seconds.
Step 5
Remove from microwave and immediately invert the cake onto a serving dish.