Mix all ingredients together in a bowl. I used my to whip it really well and give it a light creamy texture.
Pour into a mason jar and seal it up until ready to use.
Notes
Getting it out of the mason jar can be an adjustment. Use a popsicle stick to dip into the toothpaste and spread nicely onto the toothbrush. You can also use a squirt bottle (you will need to cut the pointed tip wider).
Adding activated charcoal can be a gentle way to whiten your teeth.