Description

A 100-gram serving of blueberry sauce is a versatile, sweet-and-tangy fruit reduction typically used as a topping or filling. It is characterized by its vibrant deep blue-purple color and rich, fruity flavor, often featuring a chunky texture from whole berries, though it can be strained for a smoother consistency. 
Here is a description based on a standard 100g serving:

1. Flavor and Texture
Taste: Sweet and tangy, with a deep berry flavor.
Texture: Lightly thick and spoonable, often containing soft, broken-down berries (compote-style).
Consistency: Glossy and syrupy. 

2. Key Ingredients
Blueberries: Primarily fresh or frozen blueberries.
Sweetener: Sugar (white granulated).
Acidifier: Lemon juice or zest to balance the sweetness.
Thickener: Cornstarch (cornflour) or arrowroot, often mixed with water to create a slurry.
Optional Enhancers: Vanilla extract, cinnamon, or a pinch of salt. 

3. Nutritional Profile (Approximate per 100g)
Calories: Approximately 100–150 kcal (varies by sugar content).
Carbohydrates: Roughly 20g–30g, mostly from sugars.
Fat: Negligible (0g–0.3g).
Protein: Very low (0g–0.5g). 

4. Common Uses
Breakfast: Topping for pancakes, waffles, French toast, or oatmeal.
Desserts: Topping for cheesecake, ice cream, or yogurt.
Culinary: Filling for pastries, cakes, or paired with savory dishes like grilled chicken or brie. 

5. Storage
It is best stored in an airtight container (like a jam jar) in the refrigerator, where it can last for about 5–7 days. 
This homemade or store-bought sauce is generally free from artificial preservatives, focusing on natural fruit flavor.