1. Cream the butter and brown sugar together until light and fluffy.

2. Add the egg and vanilla extract and beat until smooth.

3. Stir in the sourdough starter and molasses until fully combined.

4. In a separate bowl sift together the flour, baking soda, salt, ginger, cinnamon, and cloves.

5. Gradually mix the dry ingredients into the wet ingredients until a dough forms.

6. Divide the dough into two disks, wrap in plastic wrap, and chill for at least 1 hour.

7. Roll the dough to 1/4-inch thickness, cut with cookie cutters, and place on a parchment-lined baking sheet.

8. Bake at 350°F for 8-10 minutes until the edges are set, then cool on the pan for 5 minutes before transferring to a cooling rack.