Chocolate-Cinnamon Sugar Cookies

1 . Stage

Microwave butter, unsweetened chocolate, and milk chocolate in a microwave-safe glass or ceramic bowl for 15-second intervals, stirring after each interval, until butter is melted, about 2 minutes. Remove from the microwave and stir until chocolate is melted and combined.

2 . Stage

Stir 1/2 cup white and brown sugar into the melted chocolate mixture until well blended. Stir in egg and vanilla extract until completely blended.

3 . Stage

Mix together flour, baking soda, cinnamon, and salt in a large bowl. Add chocolate mixture to flour mixture, mixing until well combined. Place dough in the refrigerator to cool for 30 minutes.

4 . Stage

Preheat the oven to 375 degrees F (190 degrees C). Place remaining 1/4 cup white sugar in a small, shallow bowl.

5 . Stage

Remove dough from the refrigerator and roll into 1-inch balls; knead dough before shaping if too firm. Roll balls in sugar, place 1 inch apart on ungreased cookie sheets, and flatten with the bottom of a glass or a spatula.

6 . Stage

Bake in the preheated oven until cookies are set, 8 to 10 minutes. Remove from cookie sheets to cool on wire racks.