Mix cider vinegar, 3 tablespoons coconut sugar, 2 tablespoons crushed red pepper, rosemary, and 1 tablespoon ground white pepper in small saucepan. Bring to boil. Reduce heat to low; simmer 15 minutes, stirring occasionally.
Remove from heat. Let stand at least 4 hours or overnight. Strain through several layers of cheesecloth. Cover and refrigerate until ready to serve.