Chewy Butterscotch Blondie Bars are comforting, hand-held treats with a warm, cozy butterscotch flavor. Using a box of vanilla cake mix makes these blondies fast and simple to prepare—perfect for busy bakers who want a delicious homemade dessert without the fuss.
Why you’ll love this recipe
This Butterscotch Blondie Bars recipe is part of the Time Saver Recipe series, designed to turn pantry staples into quick, satisfying baked goods. Starting with a boxed vanilla cake mix keeps prep time short while delivering soft, chewy bars studded with butterscotch chips. These bars bake in about 20 minutes, cool quickly, and slice easily for sharing.
They are ideal for holiday cookie trays, care packages, or any time you want a warm, sweet treat without a lot of time or effort. When stored properly, the bars stay soft for up to a week, making them a great make-ahead option.
Instructions
Overview: combine the cake mix with a few simple ingredients, fold in butterscotch chips, press into a pan, top with toffee, and bake. The full step-by-step instructions and ingredient list are included in the recipe card below.
- Preheat the oven to 350° F (175° C).
- In a large mixing bowl, combine the vanilla cake mix, packed brown sugar, eggs, melted unsalted butter, and vanilla extract. Mix until evenly combined.
- Fold in the butterscotch chips.
- Using a spatula, press the dough evenly into an ungreased 13″ x 9″ baking pan.
- Sprinkle toffee bits over the top and gently press them into the dough.
- Bake for 20–23 minutes, until the top is golden brown and a toothpick inserted near the center comes out with a few moist crumbs.
- Allow the blondies to cool completely in the pan before cutting into bars.
Storage
Store the blondie bars at room temperature in an airtight container or a freezer-weight zip-top bag for up to seven days. For longer storage, wrap individual bars or the whole slab tightly and freeze; thaw at room temperature before serving.
Frequently asked questions
Butterscotch is typically made from brown sugar and butter, giving it a rich, molasses-like flavor. Toffee uses similar ingredients but is cooked longer to create a hard, crunchy candy. Caramel is usually made with white sugar, cream, butter, and vanilla, producing a smooth, creamy sweetness dominated by cooked sugar and dairy.
A doctored cake mix is a boxed cake mix that has been modified by changing the usual directions and adding extra ingredients—like brown sugar, eggs, or butter—to create cookies, bars, or other baked goods with improved texture and flavor.
Often they do. Many boxed mixes contain preservatives that can help baked goods retain freshness longer than some scratch-made recipes, though storage method and ingredients still affect overall shelf life.
Related recipes
If you enjoy these blondie bars, try other easy bar and cookie recipes for gifting and sharing:
Peanut Butter Chocolate Chip Bars are thick and chewy, with a peanut-butter-forward flavor. Chocolate Chip and Butterscotch Chip Cookies combine oatmeal crunch with two types of chips. Cocoa Puff Cereal Bars add chocolatey cereal for a nostalgic twist. Rootbeer Bars deliver a unique spiced flavor. Raspberry Chocolate Chip Bars are fruity and portable for picnics, and Butterscotch Peanut Bars pair shortbread crust with melted butterscotch and crunchy peanuts.
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Butterscotch Blondie Bars (Time Saver Recipe)
Ingredients
- 1 box vanilla cake mix
- ¼ cup brown sugar packed
- 2 large eggs
- ½ cup unsalted butter melted
- 1 teaspoon vanilla extract
- 1 cup butterscotch chips
- 2 tablespoons toffee bits for sprinkling on top
Instructions
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Preheat oven to 350° F.
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In a large bowl or the bowl of an electric mixer, combine cake mix, brown sugar, eggs, melted butter, and vanilla. Mix until well blended.
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Stir in the butterscotch chips until evenly distributed.
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Press the dough evenly into an ungreased 13″ x 9″ pan using a spatula.
-
Sprinkle toffee bits over the top and gently press them into the surface.
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Bake for 20–23 minutes, or until the top turns golden brown and a toothpick shows a few moist crumbs.
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Cool completely in the pan before cutting into 24 bars.
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Store bars at room temperature in an airtight container or freezer-weight zip-top bag for up to 7 days.
Notes
- Wrap bars in pairs or individually in plastic wrap, then place snugly in an airtight container or freezer-weight bag for shipping.
- For long-distance shipping, keep the blondies uncut: wrap the entire 13″ x 9″ slab in foil and plastic wrap to protect freshness and shape.
- Include a disposable or plastic knife in a care package so recipients can slice the blondies easily.
Nutrition
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Carbohydrates: 27 g
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Protein: 1 g
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Fat: 6 g
First Published: December 6, 2015. Last Updated: December 29, 2022. Updated for clarity and reader experience.