In a medium saucepan over medium heat, add the coffee grounds with 1 quart water, the sugar, cinnamon and orange peel. Stir to combine and bring to slow boil, stirring to dissolve sugar. Remove from the heat and let steep, covered for 5 minutes. Strain, through a fine mesh strainer, into cups and serve.
*Piloncillo is often used in Mexican cuisine to sweeten drinks or deserts. It is unrefined cane sugar, usually found in the shape of small cones.