In a medium saucepan, bring cranberries and zest to a simmer over medium heat, stirring occasionally, about 5 minutes. Remove from heat, stir in Cointreau, and let cool.
Make ahead: Cover and chill up to 1 week.
Note: Nutritional analysis is per 3-Tbsp. serving.
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.