Dark Chocolate Pudding

Ingredients (6)

• + 1 cup white sugar, divided add to pantry
• + 2 tablespoons all-purpose flour add to pantry
• ✓ 1 egg
• + 2 cups milk add to pantry
• + 4 (1 ounce) squares semisweet dark chocolate (such as Baker's®) add to pantry
• ✓ 1 teaspoon vanilla extract