INGREDIENTS
2 1/4 cups
all-purpose flour
2 tsp
baking soda
1 tsp
cornstarch
1/2 tsp
salt
1/2 tsp
ground cinnamon
3/4 cup
unsalted butter, at room temperature
1 1/4 cups
dark brown sugar
1
large egg
1 tsp
vanilla extract
1 cup
Heath toffee bits
1/2 cup
Extra dark brown sugar for rolling cookies, about