While I was working on the Chocolate Chip Cookie in a Cup recipe, I knew I wanted to make a peanut butter version. So here it is, fresh from the microwave, a Peanut Butter Cookie in a Cup.

Start with one tablespoon of butter and one tablespoon of peanut butter. I used creamy, but chunky works too!

Heat together in the microwave for about 30 seconds to melt butter and soften peanut butter.

Add one tablespoon of packed dark brown sugar, one tablespoon of white granulated sugar, a tiny pinch of Kosher salt, and a splash of vanilla. Stir together.

Add one egg yolk. Discard egg white, or save for another use, do no add egg white or the cookie will be puffy and cake like.

Stir in egg yolk.

Add three level tablespoons of all-purpose flour.

Stir to combine.

This step is optional, but makes for yummy crunch texture! Use a measuring cup, or large spoon and a plastic storage bag to crush up a few peanuts.

Sprinkle peanuts on top of cookie dough.

Microwave cookie dough for about 45 seconds, depending on the strength of your microwave. Start checking for doneness at 35 seconds to be safe.

Enjoy the peanut buttery goodness with a glass of milk, or a scoop of vanilla ice cream!

Peanut Butter Cookie in a Cup

created by Melissa at No. 2 Pencil

1 Tablespoon of Butter

1 Tablespoon of Peanut Butter

1 Tablespoon of firmly packed Dark Brown Sugar

1 Tablespoon of Granulated White Sugar

2-3 drops of Pure Vanilla Extract {a splash}

Small pinch of Kosher Salt

1 egg yolk

3 level Tablespoons of All-Purpose Flour

Crushed Peanuts for topping

Melt peanut butter and butter together in microwave for about 30 seconds. Add sugars, salt and vanilla and stir to combine. Add egg yolk and stir again. Add flour and give a final stir. Sprinkle peanuts on top and heat in microwave for around 45 seconds. Microwaves vary, so start checking for doneness at 35 seconds. Serve warm!

If you like this recipe, try my Sugar Cookie in a Cup and Chocolate Chip Cookie in a Cup.

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Thanks for reading!

Melissa