Preheat an oven to 500 F. Place a pizza stone in the oven to preheat with the oven. In a stand mixer fitted with a paddle attachment, combine the almond flour, psyllium husk, baking powder and kosher salt until combined.
Add the vinegar and boiling water slowly and mix until combined.
Add the eggs and mix until combined.
Scrape down the sides of the bowl and divide the dough into two pieces. Roll them into a round ball. This will help when you roll the dough out so it will have even edges.
Place half of the dough in the middle of two pieces of silicone coated parchment paper. Use a rolling pin to roll the dough as thin as possible. Each crust will be about 10” in diameter. Remove the top piece of parchment. Carefully remove the hot pizza stone from the oven and sprinkle on the coconut flour. Work quickly because it will start to brown fast. Flip the dough that is still connected to the other piece of parchment face down. Bake for 5 minutes. Then remove the parchment paper that is still on top and allow to bake for another 1-2 minutes until slightly golden on top. Remove to a cooling rack and repeat with the other piece of dough.
Spread cooked crust with pizza sauce, top with pepperoni and finally ½ of the mozzarella.
Place the oven on broil and heat for 1-2 minutes until the cheese is melted and browned. Repeat with the other crust. Slice each pizza into 8 pieces.