Ingredients:

• 8 ounces of unsalted butter, room temperature
• 1 cup grated aged gouda
• 2 cups unbleached flour
• 1 teaspoon kosher salt
• 1 tablespoon fresh thyme leaves chopped
• 1 egg white, lightly whisked
• 1/2 cup Fleur de Sel

Directions:

1. Place the butter and cheese in the bowl of an electric mixer fitted with the paddle attachment. Beat until well combined.
2. In a medium bowl, which together flour, salt, and chopped thyme.
3. With the mixer on low speed, add the flour mixture, beating just until everything is blended and the dough can be handled.
4. Turn the dough out onto a lightly floured board. Divide it into two pieces. Roll each piece into a 1 1/2 inch cylinder. Wrap tightly in parchment paper and chill for at least 4 hours.
5. Position baking rack in the center of your oven and line two baking sheets with parchment paper.
6. Bring the cylinders to cool at room temperature. Slice into coins between 1/8 and 1/4 inch thick. Place on a the prepared baking sheets, 1 inch apart. Brush the tops of the slices with the egg white and sprinkle with some Fleur de Sel.
7. Bake for 8-10 minutes, or until puffed and golden brown.
8. Cool on a rack before serving.