Slow Cooker Pumpkin Spice Latte 10 tbs of pumpkin puree 8 tbs of vanilla 2 tsp of cinnamon 2 tsp pumpkin pie spice 5 cups of strongly brewed coffee 6 cups of milk 8 tbs of brown sugar Whipped Cream Cinnamon sticks Combine the milk and coffee, and pour into the crockpot. Whip together the other ingredients, not including the cinnamon sticks and whipped cream. Pour into the crockpot and mix together well Cover the crockpot and cook on high for two hours. Garnish with whipped cream, cinnamon stick, and a dash of cinnamon.