Mexican Chocolate Icebox Cookies with Dulce De Leche Filling

1. In a large bowl, beat butter with an electric mixer on medium to high speed for 30 seconds. Add sugar, cocoa powder, cinnamon, salt, and cayenne pepper. Beat until combined, scraping bowl occasionally. Beat in egg and vanilla until combined. Beat in flour.

2. Divide dough in half; cover and chill 1 hour or until dough is easy to handle.

3. Shape each portion of dough into a 6-inch-long roll about 1-3/4 inches in diameter. Wrap rolls in plastic wrap or waxed paper and chill about 4 hours or until dough is firm enough to slice.

4. Preheat oven to 325 degrees F. Line a cookie sheet with parchment paper. Cut rolls into 1/4-inch-thick slices. Place slices 1 inch apart on prepared cookie sheet.

5. Bake in the preheated oven for 12 to 14 minutes or until edges are firm. Cool on cookie sheet for 2 minutes. Transfer cookies to a wire rack; let cool.

6. Spread a rounded tablespoon of dulce de leche on the bottom flat side of each of half the cookies. Top with remaining cookies, flat sides down, pressing together lightly. Makes 24 sandwich cookies.