In a medium saucepan, bring blueberries and maple syrup to a low boil. Stir frequently and simmer for about 5 minutes, lightly mashing the blueberries.
Add chia seeds and cook the mixture until it thickens to your desired consistency, about 15 minutes, stirring frequently.
Remove the pan from heat and add vanilla. Serve warm or store in the refrigerator.
Nutrition information per serving (2 tablespoons): 69 calories; 1.3 g fat; 0.2 g saturated fat; 0 mg cholesterol; 1.7 mg sodium; 14.5 g carbohydrate; 2.7 g fiber; 5.4 g sugar; 1 g protein