One-Bowl Jammy Strawberry & Brown Butter Blondie Slab
A weeknight sweet that demands almost zero active time but delivers café-level nuance. We’re making a dense, chewy blondie batter directly in the saucepan we use to brown the butter. Pushing fresh spring strawberries into the top—instead of folding them in—means they roast into concentrated, jammy pockets without making our crumb tight like a bad alibi.
Save a copy to your collection for editing
Timeline
Ingredients
- 1/2 cup unsalted cultured butter((113g))
- 1 cup light brown sugar((200g), packed)
- 1/4 cup granulated sugar((50g), toasted if you have it)
- 1 large egg(room temperature)
- 1 large egg yolk(room temperature)
- 2 tsp vanilla extract
- 1 cup all-purpose flour((125g))
- 1/4 cup almond flour((25g))
- 1 tsp kosher salt
- 1 cup fresh strawberries((150g), hulled and quartered)
- 1/3 cup toasted sliced almonds((30g))
- 1 pinch flaky sea salt(for finishing)
Instructions
- 1
Preheat oven to 350°F (175°C). Line an 8x8-inch metal baking pan with parchment paper, leaving an overhang.
5 min
Tip: Metal gives crisp edges; glass insulates and steams your bake.
- 2
In a medium light-colored saucepan over medium heat, melt 1/2 cup unsalted cultured butter. Swirl constantly until it foams, subsides, and smells like toasted nuts—about 5 minutes. Butter is not a garnish here—it’s the entire flavor backbone, so take it to a deep amber. This is your beurre noisette (browned butter). Remove from heat immediately.
6 min
Tip: Using a light-colored pan lets you actually see the milk solids browning so you don't burn them.
- 3
While the butter cools slightly, prep the 1 cup fresh strawberries. Hull and quarter them so they are ready to go.
4 min
Tip: Quartering them ensures they jam up in the oven rather than releasing too much water in one spot.
- 4
Right into the warm butter saucepan, whisk in 1 cup light brown sugar and 1/4 cup granulated sugar. It will look gritty—that's fine. Vigorously whisk in 1 large egg, 1 large egg yolk, and 2 tsp vanilla extract until the batter turns glossy, pulls away from the edges, and emulsifies. We're not suffering for a weeknight sweet, so we're making the batter right in the pot to save a dish.
3 min
Tip: The extra yolk is the secret to a fudgy center instead of a cakey one.
- 5
Switch to a spatula. Fold in 1 cup all-purpose flour, 1/4 cup almond flour, and 1 tsp kosher salt just until no dry streaks remain. Stop stirring immediately. Overmixing activates gluten and ruins the fudgy texture. We want lacy crumb, not tight like a bad alibi.
2 min
Tip: Almond flour adds a beautiful nutty depth that plays perfectly off the browned butter.
- 6
Scrape the thick batter into your lined pan, spreading it evenly to the corners. Scatter the quartered strawberries and 1/3 cup toasted sliced almonds across the top, pressing them gently into the batter.
3 min
Tip: Keeping the fruit exclusively on top prevents the batter from weeping and getting soggy.
- 7
Bake for 25-28 minutes. You’re looking for golden, crisp edges that pull away from the pan, and a center that still has a slight wobble when nudged. Let time do the work—it will set as it cools.
28 min
Tip: Pull them when you think they need two more minutes. Trust the wobble.
- 8
Remove from the oven and immediately scatter 1 pinch flaky sea salt over the hot jammy fruit. Let cool entirely in the pan.
60 min
Tip: The salt cuts the sweetness and amplifies the roasted strawberry flavor.
Chef's Notes
Cami's shortcut note: If you’re impatient, wait 20 minutes and throw the pan in the fridge. The fridge is your friend here—it rapidly halts the residual cooking and locks in that dense, chewy center. Cut them cold, then let them come to room temp before serving.
Frequently Asked Questions
How long does One-Bowl Jammy Strawberry & Brown Butter Blondie Slab take to make?
One-Bowl Jammy Strawberry & Brown Butter Blondie Slab takes about 46 minutes total. That includes 18 minutes of prep and 28 minutes of cooking.
How many servings does this recipe make?
This recipe makes 9 servings.
What skill level is needed for One-Bowl Jammy Strawberry & Brown Butter Blondie Slab?
This recipe is rated easy — it's beginner-friendly and straightforward.
What ingredients do I need for One-Bowl Jammy Strawberry & Brown Butter Blondie Slab?
The main ingredients are: unsalted cultured butter, light brown sugar, granulated sugar, large egg, large egg yolk, vanilla extract, all-purpose flour, almond flour, kosher salt, fresh strawberries, toasted sliced almonds, flaky sea salt.
What type of meal is One-Bowl Jammy Strawberry & Brown Butter Blondie Slab?
One-Bowl Jammy Strawberry & Brown Butter Blondie Slab is categorized as: dessert, snack.
Ask Camille Roux a question
Sign in to chat about this recipe, get cooking tips, and ask for substitutions.
Sign in to chat