Peanut Butter Cookie for One

A giant peanut butter cookie for one is the perfect single serving dessert. It’s thick and chewy with a delicious peanut butter flavor along with tons of chocolate chips and peanut butter candies. Big enough to share, but you definitely won’t want to!

**This post was first published October 2016 and updated September 22, 2021 with new photos, recipe tips and a slightly updated recipe.**

I love making giant, single-serving cookies. They’re the perfect recipe for when you’re craving something sweet. And while this giant peanut butter cookie is definitely big enough for two (or three) people – you may have a hard time sharing. It’s thick with a delicious peanut butter flavor and slightly crispy edges. The center is chewy, almost verging on gooey, and it’s filled with chocolate chips and Reese’s Pieces – or whatever your favorite mix-ins are.

If you’ve already tried my chocolate chip cookie for one, or my double chocolate cookie for one – then you definitely should add this peanut butter version to your repertoire.

Making a Single Serving Peanut Butter Cookie

This recipe can be made in 1 bowl with very little effort:

1. Whisk together 2 tablespoons melted butter, 2 tablespoons peanut butter and ¼ cup light brown sugar. You can use 2 tablespoons dark brown sugar and 2 tablespoons white sugar if you don’t have light brown sugar on hand.
2. Then whisk in 1 large egg yolk and ¼ teaspoon vanilla extract. Note that we’re just using the egg yolk and not the whole egg here.
3. Stir in 6 tablespoons all-purpose flour and ⅛ teaspoon baking soda. I typically do this with a fork because I find that there are less lumps in the flour this way. Note that the tablespoons of flour should not be heaping. Make sure to use a proper measuring spoon and level off the top.
4. Stir in the chocolate chips and/or Reese’s Pieces. You’ll want to stir in 3 tablespoons in total. I used 2 tablespoons chocolate chips and 1 tablespoon Reese’s.
5. Form the dough into a large ball and place on a lined baking sheet.
6. Bake the cookie for about 12-14 minutes at 350F or until the top looks set and is starting to crack. When the cookie comes out of the oven, I like to dot a few extra chocolate chips and Reese’s on top for a little extra chocolate.

Every bite is peanut butter cookie heaven. And since it’s ginormous… you get lots of bites.

So to Recap – Here’s Why You’ll Love this Peanut Butter Cookie for One:

1. You don’t have to share (it says so in the name)
2. It’s ready from start to finish in about 20 minutes
3. Deliciously soft & chewy
4. Filled with peanut butter goodness
5. Way less prep time & way less effort than making regular peanut butter chocolate chip cookies

So if you’ve got a craving for cookies, and love Reese’s – this peanut butter deliciousness is the best way to go.

More single serving desserts to love:

• Peanut Butter Mug Cake
• Chocolate Chip Cookie for One
• Chocolate Mug Cake

Print Recipe

5 from 3 votes

Peanut Butter Cookie for One

 A giant, super soft peanut butter cookie for one. Filled with chocolate chips and Reese's Pieces - this single serving cookie is the perfect late night treat. Ready in under 20 minutes! 

Prep Time5 minutes mins

Cook Time13 minutes mins

Total Time20 minutes mins

Course: Dessert

Cuisine: American

Keyword: Peanut Butter Cookie for One, Single Serving Peanut Butter Cookie

Servings: 1 very large cookie

Calories: 1121kcal

Author: Fiona Dowling

Equipment

• Cookie Sheet

Ingredients

• 2 tablespoons unsalted butter (28 grams) melted
• 2 tablespoons peanut butter
• ¼ cup light brown sugar (50 grams) or 2 tablespoons white sugar and 2 tablespoons brown sugar
• 1 large egg yolk discard the white
• ¼ teaspoon vanilla
• 6 tablespoons all-purpose flour (47 grams) level off the top
• ⅛ teaspoon baking soda
• 4 tablespoons chocolate chips or Reese's Pieces or a combination

Instructions

• Preheat the oven to 350F degrees and line a cookie sheet with parchment paper or a silicone baking mat.
• Whisk together the melted butter, peanut butter and sugar until smooth.
• Whisk in the egg yolk and vanilla extract. Be sure that you only add the egg yolk and not the entire egg.
• Stir in the flour and baking soda until there are no lumps. When measuring the flour, make sure the tablespoon isn't heaping.
• Stir in 3 tablespoons of chocolate chips/Reese's. You'll have 1 tablespoon left.
• Form the cookie into a ball about 3 inches in diameter. Bake in the preheated oven for about 12-14 minutes or until the top of the cookie is set. 
• Remove the tray from the oven and dot the remaining 1 tablespoon of chocolate chips or Reese's on top of the cookie.

Notes

1. Peanut Butter: I highly recommend using smooth, commercial-style peanut butter for the best results. Natural and homemade peanut butter can separate, and lead to poor results. 
2. For 2 Cookies: Divide the dough in half and bake for 10-12 minutes, or until the tops look just set. 
3. Nutrition: Information provided is an estimate only and based on the entire cookie. 

Nutrition

Calories: 1121kcal | Carbohydrates: 136g | Protein: 19g | Fat: 58g | Saturated Fat: 28g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 16g | Trans Fat: 1g | Cholesterol: 254mg | Sodium: 352mg | Potassium: 356mg | Fiber: 5g | Sugar: 94g | Vitamin A: 1079IU | Vitamin C: 1mg | Calcium: 165mg | Iron: 4mg