Preheat the oven to 350 F and set a rack to the center of the oven. Line a baking sheet with parchment paper.
In a large mixing bowl mix almond flour, keto chow, coconut flour, baking powder, baking soda, and salt. Stir in the poppyseeds.
Add the cubed butter and cut it in with a pastry blender or rub it in with the tips of your fingers until the mixture has the consistency of rough sand.
In a separate bowl beat the egg well, then mix in the sour cream and lemon extract.
Stir the egg mixture into the dry ingredients and stir until it starts to hold together. Gently press it together until it comes together into a ball of dough.
Place it on the parchment paper on the baking sheet and pat it into a circle about an inch thick and six and a half inches across.
Cut the circle in half and then each half into quarters to make eight triangles. Pull the pieces apart slightly so there’s a little space between each one.
Place them in the preheated oven and bake 15 – 20 minutes until they are golden around the edges and starting to brown on the bottom.
While they are baking, make the glaze by stirring the lemon zest and juice into the powdered sweetener.
When the scones come out of the oven brush a thin layer of glaze on each one and sprinkle with poppy seeds while the glaze is still soft.
Serve warm or cold.