Caramel Swirl Blondies with Toasted Pecans

Buttery blondies with a caramel swirl, toasted pecans and a pinch of flaky salt: these caramel swirl blondies bring together a chewy brown sugar base and a rich caramel finish. The pecans add crunch, while the salt balances the sweetness.

The batter comes together with melted butter and a whisk. Spoon thick caramel over the top, make a few gentle swirls and bake until the edges are golden and the center is set. Let the slab cool completely before slicing so the bars hold their shape.

Why make these caramel swirl blondies?

• A melted-butter batter means you do not need an electric mixer.
• The caramel swirl creates a marbled finish without a separate frosting.
• Toasted pecans add texture throughout the bars.
• A small pinch of flaky salt finishes each piece.

Ingredients

For the blondies

• ¾ cup (170 g) unsalted butter, melted and cooled until lukewarm
• 1¼ cups (250 g) packed light brown sugar
• 2 large eggs, room temperature
• 2 teaspoons vanilla extract
• 1½ cups (180 g) all-purpose flour
• ½ teaspoon baking powder
• ½ teaspoon fine salt
• ¾ cup (85 g) chopped pecans, toasted and cooled

For the caramel swirl and finish

• ⅓ cup (about 100 g) thick caramel sauce, room temperature
• Flaky sea salt, for finishing

Ingredient notes

Choose a thick, spoonable caramel sauce rather than a thin syrup intended for drinks. It should fall from a spoon in a ribbon, not run like water. If using homemade caramel, let it cool before adding it to the batter.

Use plain caramel or salted caramel. If your caramel is already salty, use a lighter hand with the finishing salt.

How to make caramel swirl blondies

1. Heat the oven to 350°F (175°C). Lightly grease a 9-inch square metal baking pan and line it with parchment paper, leaving an overhang on two sides.
2. If your pecans are not already toasted, spread them on a baking sheet and toast for about 6 to 8 minutes, checking often, until fragrant. Let them cool.
3. Whisk the melted, lukewarm butter and brown sugar together until well combined.
4. Whisk in the eggs and vanilla until the mixture is smooth. Avoid beating in lots of air.
5. In a separate bowl, whisk together the flour, baking powder and fine salt.
6. Fold the dry ingredients into the butter mixture just until the flour disappears. Fold in the cooled pecans.
7. Spread the batter evenly in the prepared pan.
8. Drop small spoonfuls of caramel across the surface. Draw a butter knife or skewer through the top of the batter in a few loose figure-eight motions. Stop while distinct caramel ribbons remain.
9. Bake for approximately 28 to 35 minutes, checking from 28 minutes. The edges should be golden, and the center should no longer look liquid. A toothpick inserted into a blondie section, away from a caramel ribbon, should come out with moist crumbs but no raw batter.
10. Place the pan on a wire rack and sprinkle lightly with flaky salt. Cool completely in the pan, allowing about 2 hours or longer as needed.
11. Lift out using the parchment overhang and cut into 16 squares.

Tips for a defined caramel swirl

• Use cooled, thick caramel. Hot caramel can loosen the batter.
• Make only a few passes with the knife so the caramel stays visible.
• Keep most of the caramel slightly away from the pan edges, where it can stick.
• Check the blondie crumb rather than a caramel pocket when testing for doneness.
• Let the bars cool fully before cutting. Warm caramel makes clean slices difficult.

How to serve them

Serve at room temperature for tidy squares, or gently warm individual portions for a softer caramel texture. A scoop of vanilla ice cream makes a simple plated dessert.

For a dessert tray, cut the slab into smaller pieces and separate layers with parchment paper.

Storage and make-ahead tips

Store cooled blondies in an airtight container at cool room temperature for up to 3 days, provided your caramel sauce does not require refrigeration after baking. Follow any stricter storage instructions supplied with the sauce.

You can bake the bars a day before serving. Let them cool completely before covering, and slice shortly before arranging them on a platter.

Variations

• No pecans: omit the nuts without replacing them.
• Walnuts: use the same quantity of toasted chopped walnuts.
• Chocolate chips: replace half the pecans with semisweet chocolate chips.
• Extra vanilla: use vanilla bean paste in place of the extract.

Frequently asked questions

What is the difference between blondies and brownies?

These blondies use brown sugar and vanilla for their main flavor rather than a cocoa or melted-chocolate base.

Can I use store-bought caramel sauce?

Yes. Choose a thick, spoonable caramel sauce, not a thin caramel syrup.

Why did my caramel disappear into the batter?

The caramel may have been too thin, too warm or swirled too thoroughly. Use a thicker sauce and make fewer passes with the knife.

How do I know when the blondies are done?

Look for golden edges and a center that is set rather than liquid. Test a blondie section away from the caramel; moist crumbs are fine, but raw batter means it needs more time.

Can I leave out the pecans?

Yes. Leave them out and keep the remaining ingredients the same.

Can I use an 8-inch square pan?

This draft is designed for a 9-inch square metal pan. An 8-inch pan makes thicker bars and needs a separate baking-time test.

How do I get neat slices?

Cool the slab completely and wipe the knife between cuts. If the caramel is still very soft, briefly refrigerate the cooled slab before slicing.

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Ellie

Caramel Swirl Blondies

Buttery brown sugar blondies with a caramel swirl, toasted pecans and a light flaky-salt finish.

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Ingredients Equipment Method Notes

Ingredients

  

• INGREDIENT GROUP: BLONDIES
• 170 g unsalted butter melted and cooled until lukewarm
• ¾ cup
• 250 g packed light brown sugar 1¼ cups
• 2 large eggs room temperature
• 2 teaspoons vanilla extract
• 180 g all-purpose flour 1½ cups
• ½ teaspoon baking powder
• ½ teaspoon fine salt
• 85 g chopped pecans toasted and cooled (¾ cup)
• INGREDIENT GROUP: SWIRL AND FINISH
• About 100 g thick caramel sauce room temperature
• ⅓ cup
• Flaky sea salt for finishing

Equipment

• 9-inch square metal baking pan
• Parchment Paper
• Mixing bowls
• Whisk
• Rubber spatula
• Butter knife or skewer
• Wire cooling rack

Method

 

1. Heat oven to 350°F (175°C). Grease and parchment-line
2. a 9-inch square metal baking pan.
3. If needed, toast pecans for about 6–8 minutes,
4. checking often. Cool.
5. Whisk melted, lukewarm butter with brown sugar.
6. Whisk in eggs and vanilla until smooth without
7. beating in excessive air.
8. Separately whisk flour, baking powder and fine salt.
9. Fold dry ingredients into wet ingredients just until
10. combined. Fold in cooled pecans.
11. Spread batter evenly in the pan.
12. Drop small spoonfuls of caramel over the surface.
13. Swirl lightly with a knife, leaving distinct ribbons.
14. Bake approximately 28–35 minutes. Edges should be
15. golden and the center set. A toothpick inserted away
16. from caramel should show moist crumbs, not raw batter.
17. Place pan on a rack and finish lightly with flaky salt.
18. Cool completely in the pan, about 2 hours or longer
19. as needed.
20. Lift out with parchment and cut into 16 squares.

Notes

Untested development draft: test before publication.
Use thick caramel sauce, not thin beverage syrup.
Use a 9-inch square metal pan for the initial test.
Do not over-swirl the caramel.
Cool completely before slicing.
Store airtight at cool room temperature for up to
3 days unless the caramel manufacturer requires
stricter storage.
Contains wheat, dairy, eggs and tree nuts (pecans).
Check the caramel label for additional allergens.
Nutrition has not been calculated.