Core the apples and add them to the crockpot. Cook on high for at least 4 hours, or until the apples are falling apart, stirring occasionally.
Give the apples a good stir to break them up. Using a blender or food processor, transfer the mixture(in batches if needed) and blend until completely smooth before returning it to the crockpot. Using an immersion blender just blend the apples(skin and all) in the crockpot until completely smooth.
Add the chai spice(or just cinnamon to taste). Continue to cook the apple butter on high in the crockpot without a lid until it reaches the desired consistency, about an hour, depending on the type of apples used. Stir occasionally so that the bottom doesn’t scorch.
Once the apple butter has reached the desired consistency, taste and add maple syrup as needed.
Cool and store in a sealed container in the fridge.