Reese’s Peanut Butter Oat Bars – Rich, chewy oat bars layered with peanut butter, sweetened condensed milk, and chocolate. These indulgent bars are perfect for anyone craving a sweet, satisfying treat.
I adore any combination of caramel, peanut butter, and chocolate. These bars bring all three together into a single pan: a buttery oat base, a gooey peanut butter and condensed milk center, and plenty of chocolate on top. Homemade versions like this are even better than store-bought candy bars because they use fresh ingredients and bake up warm and comforting.
The texture is irresistible — a slightly crisp oat crust, a sticky-sweet filling, and melty chocolate chips mixed in. Quick or old-fashioned oats both work, giving the bars a pleasant chew and hearty bite.
For best results, use semi-sweet chocolate chips to balance the sweetness of the condensed milk and peanut butter. Scatter chopped Reese’s Peanut Butter Cups on top for extra peanut-buttery pockets of candy goodness.
These bars are easy to make and ideal for potlucks, bake sales, or an after-dinner treat. Once cooled, cut them into squares and store in an airtight container so they stay soft and chewy.
More bar cookie ideas you’ll love:
- Chocolate Chip Caramel Oatmeal Bars
- Chocolate Oatmeal Peanut Butter Bars
- Caramel Brownies
- Peanut Butter and Jelly Bars
- Chocolate Chip Blondies
- Snickerdoodle Bars
- Toffee Bars
- Peanut Butter Chip Bars
- Pumpkin Blondies
- Almond Toffee Bars
- Oatmeal Peanut Butter Bars
Reese’s Peanut Butter Oat Bars
Kara
Pin Recipe
Ingredients
Dough:
- 1 cup soft butter
- 1 ½ cups brown sugar
- 2 eggs
- 2 tsp vanilla
- 2 ½ cups flour
- 1 tsp salt
- 1 tsp baking soda
- 3 cups oats quick or old fashioned
Filling:
- 14 oz can sweetened condensed milk
- ½ cup peanut butter
- 1 cup semi-sweet chocolate chips
Topping:
- 1 cup chopped Reese’s Peanut Butter Cups about 20 mini cups
Instructions
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Preheat the oven to 350°F (175°C). Grease a 9×13-inch pan.
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In a large bowl, cream the soft butter and brown sugar together until smooth. Beat in the eggs and vanilla.
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Stir in the flour, baking soda, salt, and oats until well combined. Press half of the dough evenly into the prepared pan to form the base.
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Whisk the sweetened condensed milk and peanut butter together until smooth, then pour this filling over the dough base. Sprinkle the chocolate chips evenly over the filling.
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Crumble the remaining dough over the top and finish by sprinkling the chopped Reese’s Peanut Butter Cups.
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Bake at 350°F (175°C) for 25–30 minutes, or until the top is golden brown and the filling is set. Allow to cool before cutting into bars.