Preheat oven to 350 degrees and line a cookie sheet or baking stone with parchment paper, if desired.
Add the pecans (or other nuts) to a food processor or nut chopper. Pulse a few times (or process) to chop them finely.
Add the remaining cookie ingredients (excluding the topping) to the food processor, then pulse until a moldable dough forms. Alternatively, you can use a hand or stand mixer, or even mix the dough by hand (though it will of course take more time that way!)
Roll the dough into approximately 16 balls and place them in a shallow container.
Freeze the balls for about 1 hour to prevent them from flattening when baking.
Place frozen balls on a cookie sheet and place in preheated oven.
Bake for 10-15 minutes until lightly browned.
Remove cookies from oven and let them cool completely.
Roll the cookies in powdered sweetener.
Enjoy your cookies! Store the cookies in an air tight container or in fridge, or freeze for a up to two months at least.