I've found, roughly speaking, that a ratio of one part beeswax to ~three parts extra virgin coconut oil makes a nice, spreadable spoon butter.
3.5 ounces / 100 grams extra virgin coconut oil
~1 ounce / 35 grams beeswax, cut into small chunks
To make the spoon butter: Place the coconut oil in a mason jar and top with the beeswax. Fill a thick-bottomed saucepan with an inch or so of water, and set over gentle (low-medium) heat. Set the beeswax jar in the water. The water should come up the sides a bit. Allow the water to come barely to a simmer, and allow the mixture to melt, stirring occasionally, until all the beeswax is fluid. Turn off the heat, and allow to set. The oil is hot, so I allow it to cool and set in the pan, instead of moving it at this point. When cool, cover and keep in a dark place until ready to use.
To treat cutting boards, wooden spoons, etc: Start by making sure your wood surface is scrubbed very clean and is completely dry. Use your hands (or a cloth) to slather a generous amount of the spoon butter across the wood, working across the entire surface. Let sit over night. You can then use a smooth cloth to buff off all residual oil at this point. You should have a nice, satiny surface, not at all greasy. Reapply any time you sense your wood utensils and boards seem at all dry.
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