This blueberry coulis comes together in one pot with fresh or frozen blueberries, sugar, lemon zest, and juice. It thickens to a spoonable consistency in about ten minutes and is perfect over ice cream, cake, pancakes, or yogurt.
Combine blueberries, lemon zest, lemon juice, and sugar in a small saucepan. Zest the lemon before juicing it. Stir to combine, then taste a raw berry with the sugar and lemon and adjust to your preference.
Turn the heat to medium-low and cook until the blueberries begin releasing their juices, or thawing if using frozen berries.
Increase the heat to medium and cook, stirring occasionally, until the berries begin to pop and the sauce starts to thicken. Drag your finger through the sauce on the back of a spoon: it is ready when it holds a clean line.
Remove from heat at your desired consistency, keeping in mind the sauce will thicken further as it cools. Use hot or cool before storing.
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Notes
Yield: 4 servings; makes approximately 1 cup of sauce, depending on cooking time and desired thickness. Doneness Cue: The sauce holds a clean line when you drag your finger through it on the back of a spoon. Pull it earlier for a pourable sauce or cook longer for a jam-like consistency. Storage: Store, sealed, in the refrigerator for up to 2 weeks. Cool quickly to 40°F within two hours of cooking before sealing. Make Ahead: This sauce can be made up to 2 weeks in advance.