Chocolate-Crusted Banana Blondies
Updated August 20, 2024
- Total Time
- 1 hour
- Rating
- Comments
- Read comments
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Ingredients
2 ½ sticks unsalted butter (1 ¼ cups), more for greasing pan
200 grams chocolate wafer cookies (to make about 3 cups crumbs)
55 grams light brown sugar (about ¼ cup)
3 grams fine sea salt (about ½ teaspoon), plus a pinch
2 ripe bananas, mashed
2 large eggs
455 grams dark brown sugar (about 2 ½ cups)
2 tablespoons dark rum or 1 teaspoon vanilla extract
130 grams all-purpose flour (about 1 cup)
80 grams toasted walnuts, chopped (about ½ cup)
Flaky sea salt, for sprinkling (optional)
Preparation
- Step 1
Heat oven to 375 degrees. Line a 9-by-13-inch baking pan with parchment, and grease with butter.
- Step 2
Melt 1 stick of butter in a saucepan over low heat or in microwave. Put the chocolate wafer cookies in the bowl of a food processor and process to make fine crumbs. Add the light brown sugar, melted butter and a pinch of salt. Process until the mixture is the consistency of damp sand. Dump the mixture into the pan and press it into an even layer. Bake for 7 to 10 minutes, or until the surface is firm. Remove the pan and set aside.
- Step 3
Reduce oven heat to 350 degrees.
- Step 4
In a large skillet over medium heat, melt 12 tablespoons butter, then let it cook until the foam subsides and butter turns a deep nut brown, about 5 minutes. Cool.
- Step 5
In a large bowl, whisk together bananas, eggs, dark brown sugar and rum. Whisk in brown butter. In a separate bowl, whisk together flour and fine salt. Fold into batter along with the toasted walnuts. Pour the mixture over the prepared crust and spread evenly. Sprinkle top with flaky salt if using.
- Step 6
Transfer pan to oven and bake until the top is firm and a toothpick inserted in the center emerges with a few crumbs attached (or clean) but not wet, 45 to 55 minutes. Cool completely on a wire rack; cut into 24 bars.
Private Notes
Comments
As with all of Melissa's recipes, they are a truly great starting point but my god will you be disappointed if you don't make any adjustments. Reduce the butter to 2 sticks (using one of them to grease your pan because you really don't need even full 2 sticks) and you won't feel your throat seize from being coated with fat when you take a bite of your finished brownie.
I use chocolate biscuits from Trader Joes or chocolate Teddy Grahams
Trader Joe's chocolate hazelnut biscotti is fabulous for chocolate cookie crusts.
Really enjoyed these! I had Annies chocolate bunny cookedn in the house so used these and they were very good. I used 3 bananas to use them up and I still don't think the blondies tasted more than a little banana-flavored. I agree a little less butter (2 cups total) is more than enough. I added walnuts and pecans but didn't roast them...till excellent. Will def make again.
i halved the amount of sugar and i regret that decision — tastes too healthy now! don’t be afraid of the butter on the bottom crust; you need it if you don’t want the thing crumbling everywhere. tip for those who can’t find the cookies: take butter cookies (classic butter kekse in germany), blitz them and then mix in two tablespoons of good 100% cacao. easy fix!
Just made these with half of both sugars, and they are perfect. Quite greasy though, so maybe cutting some butter from the blondie part would be a good idea.

