Slow Cooker Apple Butter

INGREDIENTS

3 lb

crisp, sweet apples, such as Fuji, Gala, Honeycrisp, or Pink Lady (about 7 medium apples)

3 tbsp

pure maple syrup

1 1/2 tsp

ground cinnamon

1/4 tsp

ground nutmeg

1/4 tsp

ground allspice

1 tsp

pure vanilla extract

Tiny pinch kosher salt