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+ servings
Total Time :1 hour 40 minutes
Servings: 14

INGREDIENTS
 

  • 4 ounces/110 grams unsalted butter
  • 1 large egg plus 1 large egg yolk
  • ¼ cup/50 grams brown sugar
  • ¼ cup/50 grams sugar
  • 1 cup/140 grams all-purpose flour
  • 1 shot espresso/1 fluid ounce
  • 1 teaspoon vanilla extract
  • ¾ cup/100 grams dark chocolate chips
  • 1 ounce/25 grams high-quality dark chocolate, finely chopped
  • teaspoon fine salt
  • A pinch of flaky salt
  • ½ teaspoon ground cinnamon

INSTRUCTIONS

  • Heat the oven to 350°F/175°C. Line a loaf pan with parchment paper.
  • Cook the butter over medium heat, stirring constantly, until lightly browned and nutty, 3 to 4 minutes. Remove immediately from the heat.
  • Pour the butter into a mixing bowl. Whisk in the brown sugar, granulated sugar, egg, yolk, espresso, and vanilla until smooth.
  • Add the flour, cinnamon, dark chocolate chips, and fine salt. Fold gently just until combined.
  • Scrape the batter into the prepared pan and smooth the surface. Scatter the chopped chocolate and flaky salt over the top.
  • Bake until the center is just set and a toothpick inserted shows moist crumbs, 20 to 22 minutes.
  • Cool completely in the pan, at least 1 hour, before slicing into 14 pieces.

RECIPE NOTES

Make them gluten free!
Use 1 cup/140 grams of a high-quality 1-to-1 gluten-free flour blend (Bob’s Red Mill or King Arthur). These blends already contain a mix of rice flour, potato starch, tapioca starch, and xanthan gum. It provides structure and prevents crumbliness.
For best results:
  • If the blend doesn’t contain xanthan gum, add ¼ teaspoon.
  • Do not pack the flour; scoop lightly to avoid a dense result.
  • Baking time may increase by 3 minutes. Keep an eye on the center.