Blondie Bars

Quick answer

Total time: 40 min
Level: Easy
Servings: 9 servings
Ingredients: 6

About this dish

Blondie bars take the dense, fudgy structure of brownies and replace the chocolate with the caramel depth of browned butter and brown sugar.

Cooking the butter slowly until it turns a deep golden-brown color produces a pronounced nutty, toasted aroma that functions as the flavor backbone of the entire bar - more complex than plain melted butter can deliver. Brown sugar dissolves into the browned butter and contributes a toffee-like sweetness with a molasses undertone that white sugar simply cannot replicate. Eggs and vanilla extract add warmth, richness, and depth to round out the flavor. Using a modest amount of flour is deliberate: too much tips the texture toward cakey, while the right quantity keeps the baked bars dense, chewy, and slightly underdone in the center. The surface develops a thin, crackly shell during baking, while the interior stays soft and slightly sticky - that contrast of textures is central to a properly made blondie. The bars must cool completely before slicing; cutting too early causes them to collapse and lose their clean edges.

Ingredients

servings

IngredientAmountUnit

butter150 gg

brown sugar180 gg

egg1 eaea

all-purpose flour180 gg

vanilla extract1 tsptsp

salt½ tsptsp

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Instructions

Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.

6 steps

1

Season

Preheat the oven to 175°C and line a 20cm square pan with parchment.

Measure the butter, brown sugar, flour, salt, egg, and vanilla before starting, because the browned butter needs quick handling once it reaches the right color.
2

Control

Melt 150g butter in a saucepan over medium heat.

Let it foam, then watch closely as the foam settles and the milk solids turn deep golden brown with a nutty aroma. Remove it from the heat immediately to prevent burning.
3

Season

Pour the browned butter into a mixing bowl so the hot pan does not keep cooking it.

Stir in 180g brown sugar until evenly moistened, then cool the mixture to 30 to 40°C before adding the egg so it does not scramble.
4

Season

Add 1 egg and 1 teaspoon vanilla extract, then stir until the mixture looks glossy and cohesive.

A few fine sugar grains are acceptable, so stop once the batter looks smooth rather than beating in extra air.
5

Season

Add 180g all-purpose flour and 1/2 teaspoon salt, then fold with a spatula instead of whipping.

Stop as soon as no dry flour remains, because extra mixing pushes the bars toward a tougher, cakier texture.
6

Heat

Spread the batter evenly in the prepared pan and level the surface.

Bake for 22 to 25 minutes, until the edges are set and the center springs back lightly. Cool completely before slicing so the dense interior holds clean edges.

Practical Cooking Checks

The cues that matter most while cooking.

Key technique: Blondie Bars use browned butter and brown sugar to create a dense, fudgy texture with toffee notes.
Finish cue: Add 1 egg and 1 teaspoon vanilla extract, then stir until the mixture looks glossy and cohesive.
Avoid this: Remove it from the heat immediately to prevent burning.
Substitution: Blondie bars take the dense, fudgy structure of brownies and replace the chocolate with the caramel depth of browned butter and brown sugar.
Storage and reheating: Texture becomes chewier the next day.