Combine crust ingredients in a food processor and pprocess until a uniform dough forms. This can take 2-3 minutes on high. Keep going until it forms a ball of dough.
Press into the bottom of a 9 x 9 inch baking dish lined with parchment paper. Bake for 15-20 minutes until golden brown.
Combine 5 tablespoons butter, sweetener, and cream over medium heat. Stir until the sweetener is dissolved. Cook until it is a deep golden brown. As soon as it reached that deep color (right before burning) remove from the heat and immediately add the other 1 tablespoon butter. Stir until smooth. Add the vanilla and toasted pecans. Cool for 10 minutes.
Pour on top of the prepared crust. Refrigerate until firm.
Notes
This crust is a little crumbly when warm but sets up nicely when you chill it. I recommend cutting the bars, then chilling them, and then removing from the pan.Notes on Sweeteners: