Pancakes made with oats sit overnight to absorb the milk and are then rehydrated with seltzer water for a delicious pancake with an almost custardy center topped with cinnamon sugar butter.
In a small bowl stir together the butter, sugar, cinnamon and salt until well combined.
For the oatmeal griddle cakes:
In the bowl of a food processor fitted with the blade attachment, combine 1 cup (80g) of the rolled oats, flour, brown sugar, baking soda, cinnamon and salt. Blend until the mixture is fine. Add the butter and pulse to combine until crumbs form.
In a large mixing bowl whisk together the milk and egg until combined. Add the blended oat mixture and the remaining ½ cup (40g) of oats. Mix until just combined.
Cover and refrigerate to let the batter rest for at least 1 hour and up to overnight.
When ready to cook, stir in just enough of the seltzer to make a thick, yet pourable batter.
Heat a heavy skillet or griddle pan over medium heat. Add 2 tablespoons (28g) of the butter and allow to melt. Ladle ½ cup of the batter into the pan. Cook until the edges are crisp and you see many small bubbles on the surface.
Flip and continue cooking the pancakes until golden brown, about 1 to 2 minutes per side. Remove to a plate and serve with the cinnamon sugar butter and maple syrup.