Step 1

Whisk milk, vegetable oil, and sugar together in a 12 oz. or large mug.

Step 2

Whisk in the flour until smooth.

Step 3

Whisk in the oatmeal, baking powder, and salt until full incorporated.

Step 4

Spoon 2 tablespoons of peanut butter on top and push slightly into the batter.

Step 5

Microwave on HIGH for 30 seconds, and then in 15-second bursts until the top looks dry and cooked and springs back when pressed with a finger. Mine took about 90 seconds to cook.

Step 6

Top with the remaining tablespoon of peanut butter and let stand at least 5 minutes before eating.