Add the almond flour, coconut flour, golden flaxseed meal, baking soda, xanthan gum, salt, and monkfruit/allulose blend to a medium bowl. Whisk to combine.
Add the melted butter, egg, buttermilk, and vanilla extract, and stir to combine.
Let the batter rest for 5 minutes (it will thicken).
Meanwhile, heat a nonstick skillet over medium heat. Once hot, brush a little coconut oil inside, and then use a 1/4-cup measuring spoon to scoop the batter into the hot skillet. Repeat if you can fit more pancakes in the same skillet. Once you scoop the batter into the skillet, turn the heat down to medium-low, place a piece of foil on top, and cook until golden on the first side, about 60 to 70 seconds.
Use a thin metal spatula to flip the pancake(s) and cook until golden on the second side, about 15 to 20 seconds.
Transfer the pancake(s) to a plate and cook the remaining batter the same way (you should get about 7 pancakes if you measure 1/4 cup of batter for each pancake).
Serve with any toppings you like.