Place all 3 ingredients into a food processor or mixing bowl. Turn the food processor on high and mix until combined. If you're using a mixing bowl and hand mixer, mix on medium until completely combined.
Place in a serving dish. Chill, if you prefer.
Slice up and core a couple of apples to go along with the dip.
Store in the fridge.
Notes
You will need a food processor to make the walnut butter.