Identify where blueberries go in your recipe: batter (muffins/pancakes), filling (crumble/pie), or topping (yogurt/oats).
Choose the closest match from the list: frozen blueberries for texture, raspberries/blackberries for tart depth, strawberries for sweetness, jam for emergency cooking.
Measure by the listed ratio (or use 1:1 for most berry-to-berry swaps). For jam, start at the lower ratio since it’s concentrated.
Control moisture: if the substitute releases lots of liquid (thawed berries or jam), drain briefly or stir in a spoon of thickener to prevent soggy centers.
Adjust sweetness and color: raspberries lean tangier, strawberries lean sweeter—taste the batter/filling before baking.