Cream butter and cream cheese. Add flours and flax and mix well. Make into 24 balls; place one ball in each cup of a mini tart pan. Use your fingers, a measuring teaspoon, or a tart tamper to press out into a tart shell.
Divide pecans and chocolate chips (if using) into each cup.
To Make Filling:
Preheat oven to 350.
Put the eggs, sweetener, molasses, melted butter, salt, and vanilla into a medium bowl. Mix well. Fill the tart shells. I put 1.5-2 teaspoons onto each. Bake for about 20-30 minutes or until lightly browned.
*** I get a lot of comments from my low carb readers on the use of molasses. I use it for flavor, not sweetness. One teaspoon of molasses has 5 grams of carbs. This recipe uses 1 teaspoon divided by 24 servings. That is less than .25 grams of carbs from the molasses. If you prefer you can just omit it.