Dark Chocolate Toffee Blondies — Chewy, buttery blondie bars studded with toffee bits and dark chocolate chips. Expect warm vanilla notes and loads of toffee flavor.
These Dark Chocolate Toffee Blondies are simple to make and require no scooping or shaping. Use an 8×8 or 9×9 pan for easy, crowd-pleasing bars. They bake up chewy with a tender crumb and plenty of toffee and dark chocolate in every bite.
If you enjoy this recipe, try some other favorites for more inspiration.
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Why they are the best
- Easy to make — One-bowl (plus a small bowl for dry ingredients) and no mixer required. Perfect for bakers of any level.
- Soft, chewy texture — A buttery base and the right bake time give these bars a tender, chewy bite.
- No chilling required — Mix and bake right away for a quick treat.
- Toffee pieces — Toffee adds crunch and caramel flavor that pairs beautifully with dark chocolate.
What you need to make Dark Chocolate Toffee Blondies
Below are notes on key ingredients to help you get the best results. The full ingredient list and measurements are in the recipe card.
- Unsalted butter — Using unsalted butter lets you control the salt level.
- Brown sugar — Light brown sugar adds moisture and a light caramel flavor.
- Eggs — Bring eggs to room temperature for better mixing and texture.
- All-purpose flour — Unbleached flour works well for structure and flavor.
- Dark chocolate — Dark chocolate balances the sweetness of the toffee; milk chocolate can be used if you prefer sweeter bars.
Step-by-step instructions
These blondies come together quickly and don’t require a mixer. You’ll need an 8×8 or 9×9 baking pan, parchment paper, two bowls, a whisk, and a rubber spatula.
Step 1: Prep the pan. Preheat the oven to 350°F (175°C). Line an 8×8 or 9×9 pan with parchment paper and spray lightly with cooking spray. Set aside.
Step 2: Combine dry ingredients. In a bowl, whisk together the all-purpose flour, baking powder, and salt.
Step 3: Whisk butter and sugar. In a medium bowl, whisk the melted and cooled butter with the brown sugar until the mixture is lighter and slightly fluffy, about 2 minutes.
Step 4: Add eggs and vanilla. Whisk in the egg and egg yolk for about 30 seconds, then add the vanilla extract and whisk until just combined.
Step 5: Fold in dry ingredients and mix-ins. Use a rubber spatula to fold in the flour mixture, cornstarch, dark chocolate chips, and toffee pieces. Mix only until there are no visible streaks of flour—do not overmix.
Step 6: Spread the batter. Transfer the batter to the prepared pan and spread it evenly.
Step 7: Garnish. Scatter a few extra chocolate chips and toffee pieces on top for a pretty finish.
Step 8: Bake. Bake for 25–28 minutes, until the edges are set and a toothpick inserted near the center comes out with a few moist crumbs. My bars took about 27 minutes.
Step 9: Cool and cut. Let the blondies cool completely in the pan before lifting them out on the parchment and slicing into squares. For an extra touch, sprinkle flaky sea salt on top before serving.
Expert baking tips for these Dark Chocolate Toffee Blondies
- Use a light-colored, high-quality baking pan to avoid over-browning the edges.
- Preheat your oven for at least 20–30 minutes so it reaches and maintains the proper temperature.
- Spoon and level flour when measuring for the most accurate results.
Storing
Store the blondies in an airtight container at room temperature for up to 5 days.
They also taste great chilled—cold slices have a firmer texture and intensified flavor.
Freezing
To freeze, wrap individual pieces or layers in plastic wrap and place in an airtight container or freezer bag for up to 3 months. Thaw at room temperature or enjoy straight from the freezer.
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Recipe
Dark Chocolate Toffee Blondies
Molly Murphy
Ingredients
For the bars
- ¾ cup unsalted butter, melted and cooled
- 1 cup brown sugar, packed
- 1 large egg, room temperature
- 1 large egg yolk, room temperature
- 1 teaspoon pure vanilla extract
- 2 cups all-purpose flour
- 1 Tablespoon cornstarch
- 1 teaspoon baking powder
- 1 cup toffee bit pieces
- ¾ cup dark chocolate chips
- 1 teaspoon salt
Instructions
For the bars
- Preheat the oven to 350°F. Line an 8×8 or 9×9 pan with parchment and spray with cooking spray.
- Whisk together the flour, baking powder, and salt in a separate bowl.
- In a medium bowl, whisk the melted butter and brown sugar until lighter in color, about 2 minutes.
- Whisk in the egg and egg yolk for 30 seconds, then add vanilla and whisk until just combined.
- Fold in the flour mixture, cornstarch, chocolate chips, and toffee pieces with a rubber spatula until no streaks of flour remain. Do not overmix.
- Spread the batter evenly in the prepared pan.
- Top with a few extra chocolate chips and toffee pieces.
- Bake 25–28 minutes, until the edges are set and the center has just a few moist crumbs. Cool completely before cutting. Optional: finish with flaky sea salt.
Let us know how it was!