Brownie Bites

Ingredients

• 2/3 cup (150 mL) flour
• 1/3 cup (75 mL) unsweetened cocoa powder
• 2 tbsp (30 mL) cornstarch
• 1 tsp (5 mL) baking powder
• 1/4 tsp (1 mL) baking soda
• 1/4 tsp (1 mL) salt
• 1 cup (250 mL) packed light brown sugar
• 1/4 cup (60 mL) prune butter
• 2 tbsp (30 mL) plain fat-free yogurt
• 2 tbsp (30 mL) extra-light olive oil
• 2 large egg whites
• 3 tbsp (45 mL) semisweet chocolate chips (1 oz / 28 g)
• 1/2 cup (125 mL) coarsely chopped walnuts