Add eggs, Greek yogurt, almond milk, maple syrup, vanilla extract, oats, baking powder, and cinnamon in a blender. Blend until smooth (~20-40 seconds).
Let batter sit for 8 minutes while heating a nonstick pan over medium-low heat.
Pour 1/4 to 1/3 cup of batter onto the pan, add optional mix-ins, and cook 2-3 minutes until edges firm and bubbles form.
Flip and cook for another 1 minute until golden. Serve immediately with toppings of choice.
Notes
Preheat oven to keep pancakes warm if making a large batch.