Unique Custard Filled Dutch Baby!

This is a unique Dutch Baby recipe because of the custard that forms in the center of this cake while it bakes! I found this recipe on 'The Recipe Diva' cooking website. Posted by a member named Sweet Potato. I compared it to other Dutch Babies recipes. This recipe is the only one I found that had a custard center! It was delicious! It's suppose to serve 4 but I almost ate the entire thing myself!

Unique Custard Filled Dutch Baby
INGREDIENTS;
2Tbls.butter
3 large eggs
3/4 cup all purpose flour
1 1/2 cups milk - I used 1%
1/2 tsp. kosher salt
1/4 cup sugar

 DIRECTIONS;
Preheat oven to 425 degrees.
Place the butter in a 9 inch round baking dish and put in the oven.
Put all the other ingredients into a blender and blend on high for about a minute.
When butter has melted in the baking dish, remove from oven a whirl butter in dish to coat.
Then pour in the blended egg mixture and bake uncovered for 30 minutes.
Slice and serve warm with maple syrup.