Chewy, rich, and naturally sweetened without added sugar, these Sugar-Free Chocolate Peanut Butter Oat Bars feature a buttery oat crust layered with a silky fudge center. They make an easy holiday favorite or meal-prep snack that freezes beautifully!
Why You’ll Love This Recipe
100% Sugar-Free & Guilt-Free: Uses sugar-free chocolate chips and natural sweetener to keep carbs low.
No-Fuss & Meal-Prep Friendly: Freezes exceptionally well—just thaw for 10 minutes before serving.
Chewy & Decadent: Combines toasted oats and creamy peanut butter with a rich chocolate fudge layer.
Essential Kitchen Equipment
8×8-inch or 9×9-inch Baking Pan: Fits the crust and fudge layers evenly.
Parchment Paper: Allows for easy removal and slicing into neat squares.
Ingredients
Oat Base & Topping:
2 cups Rolled oats (gluten-free if desired)
1 cup Almond flour or all-purpose flour
1/2 cup Sugar-free granulated sweetener (erythritol, monk fruit, or stevia blend)
1/2 cup (1 stick) Unsalted butter, melted
1/3 cup Creamy sugar-free peanut butter
1 large Egg
1 tsp Vanilla extract
1/2 tsp Baking soda
1/4 tsp Salt
Sugar-Free Fudge Layer:
1 1/2 cups Sugar-free chocolate chips (semi-sweet or dark)
1/2 cup Creamy sugar-free peanut butter
2 tbsp Butter or heavy cream
Step-by-Step Instructions
1. Prep Oven & Pan: Preheat your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving an overhang on the sides.
2. Make Oat Dough: In a large bowl, whisk together rolled oats, flour, granulated sweetener, baking soda, and salt. Stir in melted butter, 1/3 cup peanut butter, egg, and vanilla extract until a crumbly dough forms.
3. Press Base: Press two-thirds of the oat mixture firmly into the bottom of the prepared baking pan to form a smooth crust. Set aside the remaining one-third for the topping.
4. Melt Fudge Layer: In a microwave-safe bowl, combine sugar-free chocolate chips, 1/2 cup peanut butter, and 2 tablespoons of butter. Microwave in 30-second intervals, stirring between each, until completely melted and smooth.
5. Layer & Bake: Pour the chocolate fudge mixture over the unbaked oat crust. Crumble the reserved oat mixture evenly over the top of the chocolate layer.
6. Bake & Cool: Bake for 20 to 25 minutes until the edges are golden brown. Allow the bars to cool completely in the pan, then chill in the refrigerator for 1 hour to set the chocolate before slicing into 16 bars.
Chef’s Tips
Clean Slices: Use a warm, sharp knife to cut through the set fudge layer for clean, picture-perfect squares.
Freezing Instructions: Store sliced bars in a freezer-safe container separated by parchment paper for up to 3 months. Thaw at room temperature for 10 minutes before serving!
Nutritional Breakdown (Per Bar / 16 Bars Yield)
Servings: 16 bars
Calories: ~165 kcal
Protein: 5g
Net Carbs: 6g
Fat: 12g
Frequently Asked Questions (FAQ)
Can I make these bars completely dairy-free?
Yes! Swap the butter for coconut oil or vegan butter blocks, and ensure your sugar-free chocolate chips are dairy-free/vegan.