In a 2 quart saucepan, cook tog butter, brown sugar and corn syrup for about 2 minutes. Add the baking soda, which will foam, so this is the reason for the larger saucepan. Allow the foam to cook down slightly, then pour over the popcorn twists, stirring well.
Place into a 250 degF oven for 45 minutes, stirring every 10-15 minutes. Remove from oven and pour onto wax paper, allowing to cool slightly, then break apart.