A gingersnap, ginger snap, ginger nut, or ginger biscuit is a biscuit flavored with ginger. Ginger snaps are flavored with powdered ginger and a variety of other spices, most commonly cinnamon, molasses and clove. There are many recipes. 

Gingersnaps

Ingredients
6 tablespoons shortening
6 tablespoons unsalted butter room temperature
1 cup sugar
⅓ cup light molasses
1 egg
2⅓ cups flour
2 teaspoons baking soda
2 teaspoons ground ginger
1 teaspoon cinnamon
½ cup sugar to roll dough balls in

Instructions
In a large mixing bowl, cream shortening, butter, and sugar.
Add molasses and egg, and beat again until everything is combined.
In a separate mixing bowl, whisk together dry ingredients. Add to butter mixture. Mix well.
Cover and chill dough in the refrigerator for at least 1 hour or overnight.
When ready to bake, preheat oven to 350°F.
Roll in small balls (using a ½-tablespoon cookie scoop). Drop in extra sugar, and roll the cookie ball until fully coated in sugar.
Place 2 inches apart on a greased cookie sheet. Bake at 350°F for about 11 minutes for cookies that are crisp with a slightly soft center, or up to 13 minutes for crispier cookies all the way through.

Allow to cool for at least 3 minutes on the baking sheet before transferring to a cooling rack.

Image and Recipe from The Precious Wife