Chocolate-Espresso Ice Cream Sandwiches

Whisk together flour, cocoa, baking soda, and salt in a small bowl. Beat butter, sugars, and vanilla in a large mixer bowl at medium speed until creamy. Add egg and espresso; beat until combined. Reduce speed to low and gradually add flour mixture; beat just until incorporated. Fold in chocolate chips. Chill dough in the refrigerator for 30 minutes.

Preheat oven to 350°F and line 2 baking sheets with silicone mats or parchment paper. Form 30 1-inch balls of dough and place 2 inches apart on prepared baking sheets. Bake, rotating pans halfway through, for 9 to 10 minutes or until cookies are set. Cool for 2 minutes on baking sheets, then transfer to a wire rack to cool completely.

When ready to assemble sandwiches, place a small scoop (about 2 tablespoons) ice cream onto 15 cookies and sandwich with remaining cookies. Wrap each sandwich in plastic wrap; freeze 2 hours or until firm before serving. Store leftovers in the freezer in an airtight container up to 1 week.