Individual Chocolate Lava Cakes à la DiSomma

Ingredients

• Two 6-ounce ramekins or tempered glass custard cups
• Nonstick cooking spray
• 2 teaspoons unsweetened cocoa powder
• 3 ounces bittersweet chocolate chips or coarsely chopped chocolate bar
• 3 tablespoons unsalted butter, cut into cubes
• 1 large egg
• 1 large egg yolk
• ¼ teaspoon vanilla extract
• Pinch of salt
• 3 tablespoons sugar
• 2 tablespoons flour