– ▢2 cups (296 g) blueberrie – ▢1 cup (166 g) strawberries, chopped – ▢1 cup (123 g) raspberrie – ▢½ cup (77 g) cherries pitted, halved – ▢1 box (15.25 ounces) yellow cake mix – ▢¾ cup (1 ½ sticks / 170 g) unsalted butter, cold, diced – ▢whipped cream, for topping, optional