Mini Chocolate Chip Shortbread Cookies

Preheat oven to 350 degrees F (175 degrees C).

Mix flour, butter, sugar, and vanilla extract in a bowl until dough is smooth.

Reserve 1/4 the chocolate chips; stir remaining chips into dough until evenly distributed.

Roll dough into 24 small logs and place a baking sheet.

Bake in preheated oven until slightly golden around the edges, 15 to 20 minutes.

Cool in baking sheet for 10 minutes before removing to cool completely on a wire rack.

Melt shortening in a small saucepan over medium-low heat; stir in reserved chocolate chips until melted, about 5 minutes.

Dip cookies into chocolate and return to baking sheet.

Refrigerate until firm.