In a blender, add the ice cream, frozen banana, spices, and vanilla.
Use the pulse button on the blender to slowly mix ingredients. Hold down the button for a few seconds at a time. Repeat just until fully combined.
Pour the milkshake into a large glass and top with desired toppings. Enjoy!
Notes
If your milkshake is too thick or your ingredients aren't blending easily, add milk as need. If you do add milk, start with small increments, such as a tablespoon.