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 Pieces Cake Bars?

You need 6 ingredients. The key ingredients include: 1 box Chocolate Cake Mix, 18 Ounce Box, Additional Required Ingredients Specified On The Cake Box (typically Water, Egg And Oil---but Substitute Peanut Butter For The Amount Of Oil), 3/4 cups Reese's Mini Pieces Or Regular Reese's Pieces Lightly Chopped, 1/2 cups Unsalted Butter, Softened At Room Temperature, and more.

Is Reese’S Pieces Cake Bars suitable as baking & desserts?

Yes, Reese’S Pieces Cake Bars falls under the Baking & Desserts category and is a great choice for this type of meal.

How do I store leftover Reese’S Pieces Cake Bars?

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 Pieces Cake Bars Recipe

Name: Reese’S Pieces Cake Bars
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 box Chocolate Cake Mix, 18 Ounce Box; Additional Required Ingredients Specified On The Cake Box (typically Water, Egg And Oil---but Substitute Peanut Butter For The Amount Of Oil); 3/4 cups Reese's Mini Pieces Or Regular Reese's Pieces Lightly Chopped; 1/2 cups Unsalted Butter, Softened At Room Temperature; 1-1/4 cup Creamy Peanut Butter; 1/2 cups Powdered Sugar

Bake this irresistible Reese’S Pieces Cake Bars at home. Made with Chocolate Cake Mix, Water, Regular Reese and Unsalted Butter. Easy step-by-step instr…

This Reese’S Pieces Cake Bars relies on simple, everyday ingredients such as creamy peanut butter and powdered sugar. It comes together quickly and makes 4 servings, at about 545 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 Pieces Cake Bars 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

Servings: persons

1 box Chocolate Cake Mix, 18 Ounce Box
Additional Required Ingredients Specified On The Cake Box (typically Water, Egg And Oil---but Substitute Peanut Butter For The Amount Of Oil)
3/4 cups Reese's Mini Pieces Or Regular Reese's Pieces Lightly Chopped
1/2 cups Unsalted Butter, Softened At Room Temperature
1-1/4 cup Creamy Peanut Butter
1/2 cups Powdered Sugar

Frequently Asked Questions

Quick Info

Servings
4 servings
Calories
545 kcal
Category
Baking & Desserts

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