15 Minute Microwave Pumpkin Butter

2 cans of pumpkin (29oz each, or 6 cups pumpkin puree - NOT canned pumpkin pie filling mix)

2 cups packed brown sugar (light or dark)

1 cup pure maple syrup (not imitation)

1 Tbsp. pumpkin pie spice

1 Tbsp. cinnamon

¼ tsp. salt