How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Reese'S Peanut Butter Cup Cake?

You need 14 ingredients. The key ingredients include: 1 3/4 cups boiling water, 1 cup quick-cooking oats, 1/2 cup butter, softened, 1 cup light brown sugar, packed, and more.

Is Reese'S Peanut Butter Cup Cake suitable as baking & desserts?

Yes, Reese'S Peanut Butter Cup Cake falls under the Baking & Desserts category and is a great choice for this type of meal.

How do I store leftover Reese'S Peanut Butter Cup Cake?

Store in an airtight container at room temperature for up to 3–5 days. For longer storage, freeze for up to 3 months — no need to refrigerate or reheat.

Reese'S Peanut Butter Cup Cake Recipe

Name: Reese'S Peanut Butter Cup Cake
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 3/4 cups boiling water; 1 cup quick-cooking oats; 1/2 cup butter, softened; 1 cup light brown sugar, packed; 1 cup sugar; 2 teaspoons vanilla; 2 eggs; 1 1/2 cups flour; 1 teaspoon baking soda; 1/2 teaspoon baking powder; 1/4 teaspoon cinnamon; 1/4 teaspoon salt; 6 Reese's Peanut Butter cups; 1 (16 ounce) can prepared milk chocolate frosting

Bake this irresistible Reese'S Peanut Butter Cup Cake at home. Made with boiling water, oats, butter and light brown sugar. Easy step-by-step instructio…

This Reese'S Peanut Butter Cup Cake relies on simple, everyday ingredients such as boiling water, quick-cooking oats, butter, softened and light brown sugar, packed. It comes together quickly and makes 4 servings, at about 2881 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

Whether you're rounding off a family dinner, bringing a treat to a gathering, or simply satisfying a sweet craving, this Reese'S Peanut Butter Cup Cake delivers. Serve it warm or at room temperature, and add a scoop of ice cream or a spoonful of whipped cream for an extra-special finish.

Updated Jun 30, 2026

Serves 4 Baking & Desserts

2881

kcal

Calories

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Preheat the oven fully and bake on the middle rack for the most even results.
Check for doneness a few minutes early — a toothpick in the center should come out with just a few moist crumbs.
Let it cool before slicing so it sets properly and holds its shape.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Brown sugar instead of white sugar adds a deeper, more caramel-like flavor.
A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

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Reese'S Peanut Butter Cup Cake

Tips for the best results

Variations & substitutions

My Personal Notes

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