Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the almond flour, erythritol, baking powder, and salt.
Add the cold, cubed butter to the dry ingredients. Using a pastry cutter or your fingers, work the butter into the mixture until it resembles coarse crumbs.
In a separate bowl, whisk together the heavy cream, egg, and vanilla extract until well combined.
Stir the wet ingredients into the dry ingredients until just combined, being careful not to overmix.
Gently fold in the chopped cranberries and walnuts.
Turn the dough out onto the prepared baking sheet and form into a circular shape about 1 inch thick.
Using a sharp knife or dough scraper, cut the circle into 8 equal wedges but do not separate them.
Bake for 20 minutes, or until the scones are golden brown.
Remove the scones from the oven and allow them to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Once cool, if desired, separate the scones along the cuts you made earlier.