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–+ servings
French Cookie Recipes

Chocolate Diamond Cookies: Queen of the French Cookie Recipes

This chocolate diamond cookie is the queen of French cookie recipes, giving its more famous sisters, the madeleine and the macaron, a run for their money.
5 from 1 vote
Prep Time 15 minutes
Cook Time 16 minutes
Cool Time 1 day
Course Dessert
Cuisine French
Servings 18 cookies

Equipment

  • Pastry Scraper
  • sanding sugar
  • baking sheet
  • parchment paper
  • silicone baking mat

Ingredients
 
 

  • 200 g cold unsalted butter cubed
  • 100 g superfine sugar not confectioners’ sugar
  • 3 egg yolks at room temperature
  • 250 g all purpose flour sifted
  • 60 g cocoa powder sifted
  • 30 g dark chocolate chopped
  • Sanding sugar to coat

Instructions
 

  • In the bowl of a stand mixer using the paddle attachment, or in a large bowl using a hand mixer, beat together the butter, sugar, and eggs, until well combined. Do not overmix, as we don't to aerate the dough.
  • Add the dry ingredients (flour and cocoa), and beat until just combined.
  • Add in the chopped dark chocolate and use a rubber spatula to stir to combine.
  • Remove the dough to a sheet of plastic wrap and shape into a log. The log can be round or square, depending on your taste. Its length and width are also up to you. We shaped our cookies into a roughly 3 inch square, giving us about a 16 inch log. To make your log square, press it against a vertical baking sheet, using a pastry scraper.
  • Chill log in refrigerator for 24 hours. It should be very hard.
  • Preheat oven to 350 F and line a baking sheet with parchment paper or a silicone baking mat.
  • Remove the cookie dough log from the refrigerator and roll it in sanding sugar. If the sanding sugar won't stick (ours was fine), you can brush the log with water or egg whites.
  • Use a sharp knife to cut the cookies into half inch pieces. The cookies won't really spread or puff, so you can put them relatively close together on the baking tray.
  • Bake 16-20 minutes until the top of each cookie and outside is set. Remove from oven and let cool 5 minutes on baking sheet, before removing to a wire rack to fully cool.

Notes

Cookies will keep in an air-tight container for several days.
Keyword chocolate, cookie, French, sparkle
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