- 3/4 cup white sugar
- 1/2 cup butter
- 1/4 cup unsweetened cocoa powder
- 1/4 cup corn syrup
- 1 teaspoon vanilla extract
- 8 cups popped popcorn
- Preheat oven to 250 degrees F (120 degrees C). Grease a 9×13-inch baking dish.
- Bring sugar, butter, cocoa powder, and corn syrup to a gentle boil in a saucepan; cook until thickened, 1 to 2 minutes. Stir in vanilla extract. Pour popcorn into a large bowl, add cocoa mixture and stir until popcorn is well coated. Spread evenly in prepared baking dish.
- Bake in the preheated oven, stirring occasionally, until mixture is set, about 30 minutes.
- Remove from oven and cool to room temperature; break into clumps.