Lemon Rosemary Butter Cookies

Ingredients (9)

• 1 cup (2 sticks, 16 Tablespoons) unsalted butter, at room temperature
• 1 cup brown sugar
• 2 egg yolks, lightly beaten
• Zest of 1 lemon
• 2 Tablespoons fresh lemon juice
• 1/2 teaspoon salt
• 1 Tablespoon chopped fresh rosemary
• 2 cups all purpose flour, plus more for rolling
• 1/2 cup coarse sparkling sugar