Place halved English muffins cut side up on a 12x17 baking sheet that has at least 1 inch sides. There should be a slight gap between each piece.
6 pack English muffins
In a mixing bowl combine eggs, milk, sugar, vanilla and cinnamon. Whisk until well combined.
4 eggs, 1 cup milk, 2 tbsp. sugar, 1 tsp. vanilla extract, 1/2 tsp. ground cinnamon
Pour custard evenly over the English muffins. Flip each piece back and forth to coat evenly, leaving them cut side up. Give the pan a gentle shake to allow custard to evenly distribute in pan. Soak English muffins for 15 minutes, flipping them over halfway through.
Heat griddle over medium heat. Add a pat of butter and evenly coat the griddle. Place 4-6 English muffin pieces (depending on griddle size) cut side down leaving at least an inch of space between each.
Cook French toast 3-4 minutes until browned, then flip. Continue cooking another 3 minutes. Remove from griddle, add a new pat of butter and repeat with remaining English muffins.
Serve warm with extra butter and maple syrup. Top with powdered sugar and berries, if desired.