Description

Recreate the iconic thin and crispy snap of a classic Brussels cookie with this meticulously tested recipe. These delicate oat-based discs are sandwiched with a smooth semisweet chocolate filling for a sophisticated, buttery treat.

Ingredients

113g unsalted butter, room temperature
110g granulated sugar
66g quick oats (processed into a coarse flour)
66g all-purpose flour
1 teaspoon vanilla extract
2 tablespoons whole milk or cream
1/4 teaspoon baking soda
1/4 teaspoon table salt
225g (8oz) semisweet chocolate, finely chopped

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Instructions

Preheat your oven to 325°F (163°C) and line a heavy-gauge baking sheet with parchment paper.
Place the quick oats in a food processor and pulse until they resemble a coarse flour.
In a medium bowl, cream the butter and granulated sugar with an electric mixer on high speed for exactly 3 minutes until light and fluffy.
Add the vanilla extract and milk or cream, blending on low until just incorporated.
Whisk together the AP flour, processed oat flour, baking soda, and salt in a separate bowl, then mix into the wet ingredients on low speed until the flour just disappears.
Drop level teaspoons of dough onto the baking sheet, spacing them at least 3 inches apart to allow for significant spreading.
Roll each dough mound into a smooth ball between your palms to ensure a perfectly circular spread.
Bake for 10 to 13 minutes until the edges are light golden brown; let rest on the pan for 5 minutes before transferring to a wire rack to set.
Melt three-quarters of the chopped chocolate in the microwave at 50% power, stir in the remaining quarter to temper, then spread a thick layer on the flat side of one cookie and press another on top.

Notes

To ensure the perfect commercial-style snap, resist the urge to pull the cookies early; they need that light golden edge to crisp up properly as they cool. Using a digital scale to measure ingredients by weight is highly recommended, as the specific gravity of the oat flour is crucial for achieving the signature thin texture.

Prep Time: 20 mins
Cook Time: 12 mins
Category: Dessert
Method: Baking
Cuisine: American