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Peanut Butter Butterscotch Bars

These Peanut Butter Butterscotch Bars are a comforting, childhood-inspired dessert, perfect for any gathering. Incredibly easy and foolproof to make, they offer big flavor with minimal fuss, ensuring you enjoy a perfectly chewy, sweet, and nutty bite in no time.
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Prep Time 0 minutes
Cook Time 25 minutes
Total Time 25 minutes
Course: Baked Goods, Dessert
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • 0.5 cup unsalted butter melted
  • 1 cup creamy peanut butter
  • 1 cup packed brown sugar
  • 0.25 cup granulated sugar
  • 2 large eggs
  • 1 tsp vanilla extract
  • 1.5 cups all-purpose flour
  • 1 tsp baking powder
  • 0.25 tsp salt
  • 1 cup butterscotch chips
  • 0.5 cup chocolate chips optional

Equipment

  • Oven
  • 9x13 inch Baking Dish
  • Large Mixing Bowl
  • Whisk
  • Spatula
  • Parchment Paper

Method
 

  1. Step 1: Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish or line it with parchment paper, leaving a slight overhang on the sides for easy removal.
  2. Step 2: In a large mixing bowl, combine melted butter, creamy peanut butter, brown sugar, and granulated sugar. Whisk until smooth and well combined, ensuring no sugar lumps remain.
  3. Step 3: Crack in the large eggs and pour in the vanilla extract. Beat into the mixture until thoroughly combined, forming the foundation for moist and flavorful bars.
  4. Step 4: Gently add the all-purpose flour, baking powder, and salt to the wet mixture. Stir until just combined, being careful not to overmix to ensure tender, chewy bars.
  5. Step 5: Carefully fold in the butterscotch chips. If desired, add the optional chocolate chips, ensuring they are evenly distributed throughout the batter.
  6. Step 6: Pour the batter into the prepared pan and spread it out evenly with a spatula. Bake for 25 to 30 minutes, or until the edges are light golden brown and a toothpick inserted into the center comes out with only a few moist crumbs.
  7. Step 7: Let the bars cool completely in the pan before slicing. This allows them to set properly, resulting in clean, perfect squares. Once cooled, slice and serve immediately.

Notes

These bars are highly adaptable. Experiment with other creamy nut butters like almond or cashew. Swap butterscotch chips for chocolate, white chocolate, or a mix. Consider adding 1/2 cup chopped nuts (pecans, walnuts), pretzels for a salty crunch, or even mini marshmallows towards the end of baking for a gooey twist. A drizzle of melted chocolate or a sprinkle of flaky sea salt after cooling can elevate these bars further.
For best results, do not overmix the batter once flour is added to ensure tender bars; mix just until no dry streaks remain. Avoid overbaking; the bars should look slightly soft in the center when you pull them out, as they'll continue to set as they cool. Always cool completely in the pan for easy, clean slicing—using parchment paper with an overhang is highly recommended for effortless removal. While not strictly necessary, using room temperature eggs for baking always helps them incorporate more smoothly into the batter, leading to a more uniform texture.
Store cooled bars in an airtight container at room temperature for up to 3-4 days for a wonderfully soft and chewy texture. For extended freshness, refrigerate for up to a week in an airtight container; bring to room temperature or warm slightly before serving. To freeze, place cooled and sliced bars in a single layer on a baking sheet and freeze until solid. Then transfer them to a freezer-safe bag or airtight container, separated by parchment paper, for up to 2-3 months. Thaw at room temperature before serving.