Combine all ingredients except essential oils and vitamin E in a quart-size glass mason jar.
Place the jar in a small saucepan of water and heat over medium heat, stirring constantly, until the ingredients are melted.
Remove from heat and let cool slightly.
Stir in any desired essential oils and/or vitamin E.
Carefully pour the mixture into molds or whatever you will be allowing the lotion bars to harden in (ideas below).
Allow the lotion bars to cool completely before attempting to pop out of molds.
This recipe can be adjusted to make any quantity that you'd like. I use equal 1 cup measurements as specified in the recipe which makes 12 lotion bars with my molds. For a small batch, this recipe could be cut in half or even one fourth.
Make in different shaped molds for different holiday gifts (hearts for Valentine's Day, flowers for Mother's Day, etc.) or made in a square baking pan and then cut into actual bars.