Place the almond butter, 2 tablespoons of almond milk, vanilla, and cinnamon in a bowl. Mix on medium speed until smooth.
Add the powdered sugar and mix on medium speed to combine. If the mixture seems to thick or dry, add the other tablespoon of almond milk.
Serve with sliced Granny Smith apples. Store leftover dip in the refrigerator.
Serves 2-3.