Cream coconut oil and butter in a large mixing bowl. Add sugars and beat on medium speed until light and fluffy. Add egg and vanilla. Mix until smooth. In a separate bowl, combine two flours, baking soda and salt. Add dry mixture to the wet mixture and beat just until combined. Pour chocolate chips into the mixture and use a spatula or wooden spoon to combine.
For fluffier cookies, chill the dough for at least 2 hours. I prefer scooping out the dough before chilling with 1 TBSP scoop and placing 1 inch apart on a silpat or parchment lined sheet pan. Chill the sheet pan with the dough for 30 minutes. Bake at 350 for 10-12 minutes.
Makes 2-1/2 dozen small cookies