Heat oven to 400°F. Combine butter, sugar, egg and extract in a large mixing bowl.

Blend at medium speed, scraping bowl often, until creamy. Add flour and salt, and blend at low speed until well mixed. Divide and use food coloring by mixing in each color.

To make the cookies, insert a 1M tip into pastry bag. Fill bag with cookie dough. If it's hard to pipe add the 1 tablespoon water. Warming the piping bag with your hands will help to pipe out the cookies.

Pipe cookies onto a baking sheet lined with parchment paper.

Bake cookies for 5 to 8 minutes, or until slightly golden.

Remove to a cookie rack and let cool.

Melt black candy melts in the microwave as directed. Carefully dip the cookies into the black candy melts and place on rack to dry. Sprinkle top of the cookie with star sprinkles.

Repeat for all cookies and let fully dry before serving.