Preheat oven to 225℉. Spray 15 x 10 baking sheet with non-stick spray.
Mix 10 cups of popcorn and 2 cups whole almonds in large bowl.
In a medium saucepan, add 1 cup firmly packed light brown sugar, ½ cup butter or margarine, and ¼ cup corn syrup. Cook over low heat and stir until sugar dissolves.
Increase heat to high and boil 5 minutes. Stirring occasionally.
Remove from heat and stir in 2 teaspoons vanilla, 1 teaspoon almond extract, and ½ teaspoon baking soda.
Immediately pour over popcorn and almonds. Stirring gently to coat.
Pour mixture and spread evenly onto prepared baking sheet. Bake for 1 hour. Remove and cool completely.
Break popcorn into pieces and store in airtight container.