Mix in the vanilla, stevia, milk, and egg. Whisk until smooth.
Mix in the coconut flour, cinnamon, and baking powder.
Use a small rubber spatula to spread the batter evenly in the container.
Microwave uncovered for 90 seconds until set.
Remove the bread from the container to a cutting board, bottom side up, and allow it to cool for 5 minutes.
Fry the bread:
In a shallow bowl, whisk 1 egg with 1 tablespoon of whole milk.
Heat 1 tablespoon of unsalted butter in a nonstick skillet over medium-low heat.
Dip both sides of the bread in the egg/milk mixture. When the butter begins to foam, place the soaked bread in the pan. Cook over medium-low heat (not higher) until golden brown, about 3-5 minutes per side, pressing on the middle of the bread with a spatula to ensure contact with the pan.
Cut the toast into two triangles and serve.
The toast is excellent as is, but you can drizzle it with sugar-free syrup and dust it with sugar-free confectioners' powder if you wish.
Video
Notes
Cook the bread slices patiently over medium-low heat. This will ensure even cooking. You should also gently press on the middle of the bread with a spatula. Otherwise, the bread tends to brown on the edges rather than all over.
The sweetener is optional. If you plan on serving this dish with syrup, there's no need to sweeten the bread itself. I usually sweeten it with a touch of stevia because I don't use syrup.
Make-ahead and storage: While this toast is best when served fresh, you can make a few, allow them to cool, then freeze them in individual freezer bags (or in one freezer bag, separated with wax paper squares). Gently thaw a slice each morning in the microwave at 50% power.