Potato, plantain, or any other kind of chip of your choice
Melt 1 teaspoon butter in a large skillet over medium heat and swirl to coat. Add the ground beef and cook until browned, breaking the meat up with the back of a wooden spoon. Stir in ¼ teaspoon sea salt. Set aside.
Place 4 tablespoons butter and arrowroot, chili powder, and sea salt in a medium saucepan and set over medium-low heat. When the butter melts, whisk constantly for about 1 minute, then very slowly whisk in the milk. It may clump just a little, but keep whisking and it will soon smooth back out. Bring the mixture to a simmer and continue to whisk. When the mixture is beginning to thicken and coats the back of a spoon, immediately start whisking in the cheese. Whisk until all the cheese melts and the sauce becomes smooth. Stir in cooked ground beef. Season to taste with salt if needed. Serve warm with chips.