If you ask me, blondies are the cookie world’s best kept secret.
These chewy, buttery bars bring all the comfort of chocolate chip cookies but with a rich, caramel-like flavor from brown sugar. They’re packed with vanilla and have that perfect soft center that makes them hard to resist.
The best part? They come together in one bowl with simple ingredients you probably already have in your pantry. No mixer needed, just a wooden spoon and about 10 minutes of prep time.
They’re a crowd-pleasing treat that’s easier than cookies and more interesting than plain brownies.

Why You’ll Love These Blondies
- Quick and easy dessert – These blondies come together in under 40 minutes, making them perfect when you need a sweet treat fast or have unexpected guests.
- One-bowl mixing – No need for a fancy mixer or multiple bowls – just melt the butter, stir everything together, and you’re done with cleanup.
- Chewy, buttery texture – The brown sugar and melted butter create that perfect chewy consistency that’s somewhere between a cookie and a brownie.
- Simple pantry ingredients – You probably have most of these basic baking staples on hand already, so no special shopping trip required.
- Customizable mix-ins – Whether you prefer butterscotch chips, chocolate chips, or chopped walnuts, you can easily swap them to match your taste preferences.
What Kind of Brown Sugar Should I Use?
For blondies, dark brown sugar is your best friend since it gives these bars their signature rich, molasses-like flavor and chewy texture. Dark brown sugar has more molasses than light brown sugar, which means deeper flavor and that perfect fudgy consistency we’re after. If you only have light brown sugar on hand, don’t worry – your blondies will still turn out great, just with a slightly milder taste. Make sure to pack that brown sugar tightly into your measuring cup, and if it’s gotten hard, you can soften it by placing a slice of bread in the container overnight or giving it a quick zap in the microwave with a damp paper towel.

Options for Substitutions
This blondies recipe is pretty forgiving when it comes to swaps – here are some easy substitutions you can make:
- Dark brown sugar: Light brown sugar works just fine, though your blondies will have a slightly milder molasses flavor. You can even use regular white sugar, but add an extra tablespoon of melted butter to keep them chewy.
- Butter: Coconut oil (melted and cooled slightly) or vegetable oil can replace the butter in equal amounts. The texture will be a bit different but still tasty.
- All-purpose flour: You can substitute with whole wheat flour, but use about 3/4 cup since it’s denser. For gluten-free, try a 1:1 baking flour blend.
- Butterscotch chips: This is where you can get creative! Try chocolate chips, white chocolate chips, chopped nuts, dried cranberries, or even mini marshmallows. Just keep the amount around 1/3 cup.
- Vanilla: Almond extract works great here – just use half the amount since it’s stronger. Maple extract is another nice option for fall flavors.
Watch Out for These Mistakes While Baking
The biggest mistake when making blondies is overbaking them, which turns these chewy treats into dry, cake-like squares – they should still look slightly underdone in the center when you pull them out since they’ll continue cooking in the hot pan.
Another common error is not letting your melted butter cool for a few minutes before mixing it with the brown sugar and egg, as hot butter can actually cook the egg and create a grainy texture instead of the smooth batter you want.
Make sure to pack that brown sugar tightly when measuring, since loose brown sugar will leave your blondies lacking the rich, caramel-like flavor that makes them special.
For perfectly chewy blondies, let them cool completely in the pan before cutting – this patience pays off with clean cuts and the ideal fudgy texture.

What to Serve With Blondies?
These chewy blondies are perfect on their own, but they’re even better when served warm with a scoop of vanilla ice cream on top. The butterscotch flavor pairs really well with a cold glass of milk or a hot cup of coffee if you’re looking for an afternoon treat. I love cutting them into squares and serving them at parties alongside other desserts like brownies or cookies for a nice variety. For something a bit fancier, try drizzling some caramel sauce over the top or dusting them with a little powdered sugar before serving.
Storage Instructions
Store: These blondies stay soft and chewy when stored in an airtight container at room temperature for up to a week. I like to cut them into squares first, then layer them with parchment paper between each layer to keep them from sticking together.
Freeze: Blondies freeze really well for up to 3 months! You can freeze the whole pan (wrapped tightly in plastic wrap and foil) or cut them into individual squares first. I love having single servings ready to grab from the freezer when I need a quick sweet treat.
Thaw: Let frozen blondies thaw at room temperature for about 30 minutes, or pop individual squares in the microwave for 10-15 seconds to warm them up. They taste almost as good as fresh-baked, and the butterscotch chips get nice and gooey again.
| Preparation Time | 10-15 minutes |
| Cooking Time | 18-25 minutes |
| Total Time | 28-40 minutes |
| Level of Difficulty | Easy |
Estimated Nutrition
Estimated nutrition for the whole recipe (without optional ingredients):
- Calories: 1300-1400
- Protein: 7-10 g
- Fat: 70-80 g
- Carbohydrates: 160-170 g
Ingredients
- 1/2 cup unsalted butter, melted (1 stick, 112 g)
- 1 cup dark brown sugar, packed (220 g)
- 1 large egg, beaten
- 1 tsp vanilla extract
- 1/2 tsp baking powder
- 1/8 tsp baking soda
- Pinch salt
- 1 cup all-purpose flour (128 g)
- 1/3 cup butterscotch chips (or use chocolate or chopped walnuts, 60 g)
Step 1: Prepare the Pan and Preheat the Oven
- 1/2 cup unsalted butter, melted (1 stick, 112 g)
Preheat your oven to 350°F (175°C).
Lightly butter and flour an 8×8-inch (20cm x 20cm) baking pan, ensuring you cover the bottom and sides to prevent the blondies from sticking.
Step 2: Mix the Wet Ingredients
- 1/2 cup unsalted butter, melted (1 stick, 112 g)
- 1 cup dark brown sugar, packed (220 g)
- 1 large egg, beaten
- 1 tsp vanilla extract
In a mixing bowl, whisk together the melted butter and dark brown sugar until fully blended and smooth.
Add the beaten egg and vanilla extract, and continue whisking until the mixture is cohesive.
I always find that whisking the sugar thoroughly with the melted butter makes the blondies extra chewy.
Step 3: Combine Dry Ingredients and Make the Batter
- 1/2 tsp baking powder
- 1/8 tsp baking soda
- pinch salt
- 1 cup all-purpose flour (128 g)
- 1/3 cup butterscotch chips (or use chocolate or chopped walnuts, 60 g)
Add the all-purpose flour, baking powder, baking soda, and a pinch of salt into the wet mixture.
Stir everything together until there are no dry streaks of flour remaining.
Gently fold in the butterscotch chips (or your chosen mix-ins) until evenly distributed throughout the batter.
Step 4: Bake the Blondies
- batter from Step 3
Pour the finished batter into the prepared pan.
Spread it evenly with a spatula.
Place the pan in the preheated oven and bake for 18 to 25 minutes, or until a tester inserted into the center comes out clean and the edges are lightly golden.
Step 5: Cool, Slice, and Serve
Remove the pan from the oven and allow the blondies to cool completely.
Once cooled, cut them into squares or rectangles as desired and serve.
For extra freshness, store any leftovers in an airtight container at room temperature.