In a medium bowl, whisk together the liquid egg whites, 0.5 cup of the Greek yogurt, vanilla extract, and sea salt until smooth.
Fold in the oat flour, vanilla protein powder, baking powder, and 0.5 tsp of ground cinnamon until a thick batter forms.
In a small separate bowl, combine the almond butter, maple syrup, and the remaining 1 tsp of ground cinnamon to create the swirl mixture; add a drop of water if needed to reach a pipeable consistency.
Heat a non-stick griddle over medium-low heat and lightly coat with cooking spray.
Pour the batter onto the griddle to form three large pancakes.
Carefully drizzle or pipe the cinnamon-almond butter mixture in a spiral pattern onto the wet surface of each pancake.
Cook for 3-4 minutes until bubbles form on the edges, then flip carefully and cook for another 2 minutes until golden brown.
Mix the remaining 0.1 cup of Greek yogurt with a splash of water or stevia to create a glaze and drizzle over the warm pancakes before serving.