Heat oven to 375°F. On microwavable plate, microwave biscuits, uncovered, on Medium (50%) for 50 to 60 seconds or until thawed, turning biscuits over halfway through microwaving.
Spoon 1 teaspoon of the melted butter into each of 2 ovenproof 10-oz. custard cups or ramekins; tilt cups to completely coat bottom with butter. Place 1 tablespoon caramel topping in each cup. Top each evenly with blueberries and pistachios.
In small bowl or resealable food-storage plastic bag, mix sugar, vanilla powder and cinnamon. Cut each thawed biscuit into 6 pieces. Lightly dip each piece into remaining melted butter; roll or shake in sugar mixture to coat. Place 6 coated biscuit pieces in each custard cup. Drizzle with any remaining butter; sprinkle with any remaining sugar mixture.
Bake at 375°F. for 21 to 26 minutes or until biscuits are golden brown and edges are bubbly. Cool 10 minutes. Run knife around edge of custard cups; invert onto individual plates. If desired, serve with yogurt.