Name: One Bowl Blondies
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Yield: 24 servings
Cuisine: American
Ingredients: 1 cup unsalted butter (melted); 2 cup packed dark brown sugar; 2 eggs (lightly beaten); 1 tbsp vanilla extract; 2 cup all-purpose flour; 0.75 tsp baking powder; 0.5 tsp baking soda; 0.5 tsp salt; 1 cup chocolate chips; 1 cup toffee pieces; flaked sea salt (for sprinkling)

These one bowl blondies are soft, chewy, and packed with brown sugar flavor. Mix everything in one bowl for easy cleanup. A family favorite dessert recipe!

Why These One Bowl Blondies Are a Family Favorite

These one bowl blondies start with a vanilla and brown sugar base that gives them a rich, caramel-like flavor. They’re soft and chewy, just like a good cookie bar should be. What makes this easy blondies recipe stand out is how simple it is, you mix everything in one bowl, no electric mixer needed, and the results are consistently great. I’ve made these for bake sales, potlucks, and lazy weekends, and they always disappear fast.

4 Reasons to Love This Easy Blondies Recipe

Only one bowl to wash, less cleanup means more time enjoying dessert.
The combination of dark brown sugar and vanilla creates a deep, buttery flavor that’s hard to beat.
They stay soft and chewy for days, thanks to the right ratio of butter to flour.

Key Ingredients for Perfect Blondies

Dark brown sugar: Its higher molasses content gives blondies their signature moisture and deep caramel flavor. Light brown sugar works in a pinch but the result will be less rich.
Unsalted butter: Using unsalted lets you control the salt level. If you only have salted, reduce the added salt to 1/4 teaspoon.
Vanilla extract: Pure vanilla extract enhances the buttery notes. This recipe uses a full tablespoon, so don’t shortcut with imitation.

Kitchen Tools You’ll Need for Blondies

9×13-inch baking pan
Parchment paper (for easy removal)
Large mixing bowl
Wooden spoon or silicone spatula

Tips for Making the Best Soft Chewy Blondies

When mixing the batter, be careful not to overmix after adding the flour, stir just until no streaks remain, or the blondies can turn tough. The dough will be thick and slightly sticky; that’s normal. Bake until the center is just set, about 30 to 40 minutes, but start checking at 30 minutes. A toothpick inserted near the center should come out with a few moist crumbs, not wet batter. Let them cool completely in the pan before lifting out with the parchment to get clean squares.

Expert Tips for Perfect Vanilla Blondies Every Time

Dark brown sugar is key here, it has more molasses than light brown sugar, which adds moisture and a deeper flavor. Use real vanilla extract, not imitation, since vanilla is the star. If you’re using a glass baking dish, reduce the oven temperature by 25°F and check earlier, as glass retains heat and can overbake the edges.

How to Know When Blondies Are Done

Since blondies are dense, it can be tricky to tell when they’re fully baked. The edges will pull away from the pan and look golden brown, while the center will still look slightly soft and puffed. A toothpick inserted into the center should come out with a few moist crumbs, if it’s wet, bake another 2-3 minutes. Remember they continue to set as they cool, so don’t overbake.

One Bowl Blondies Variations to Try

Switch up the mix-ins based on what you have. Instead of chocolate chips and toffee, try white chocolate chips with macadamia nuts, or peanut butter chips with pretzel pieces. For a dairy-free version, use a plant-based butter alternative and dairy-free chocolate chips. To make them gluten-free, substitute a cup-for-cup gluten-free flour blend that contains xanthan gum.

Serving Ideas for Homemade Blondies

Serve these blondies warm with a scoop of vanilla ice cream and a drizzle of caramel sauce for an easy dessert. They’re also great with a cold glass of milk or a cup of coffee. For a extra touch, dust with powdered sugar or add a dollop of whipped cream.

How to Store Your Brown Sugar Blondies

Store cooled blondies in an airtight container at room temperature for up to 3 days. Layer them with parchment paper to prevent sticking. They’ll stay soft and chewy. For longer storage, see the freezing instructions below.

Can You Freeze One Bowl Blondies?

Yes, these blondies freeze well. Wrap individual squares tightly in plastic wrap, then place them in a freezer-safe bag or container. Freeze for up to 3 months. Thaw at room temperature, or warm in the microwave for about 20 seconds for a fresh-from-the-oven taste.

Best Way to Reheat Blondies

To bring back that just-baked warmth, microwave a blondie for 10 to 15 seconds. For a crisper edge, reheat in a 350°F oven for 5 minutes. Be careful not to overheat or they’ll become dry.