Fluffy and Crisp Waffle Custard Sandwich

• 90 grams Cake flour
• 30 grams Granulated sugar
• 1 several drops Vanilla Oil
• 30 grams Unsalted butter
• 1 Egg
• 1 tsp Baking powder
• 125 ml Milk
• 400 ml Milk
• 4 1/2 tbsp Cake flour
• 80 grams Granulated sugar
• 4 Egg yolk
• 1/2 stick Vanilla Beans (or Vanilla Extract)
• 1 Unsalted butter

1. In a bowl, mix together the egg yolk and granulated sugar.
2. Melt butter in milk and add to the bowl with the vanilla oil.
3. Mix.
4. In a separate bowl, whip the egg white until it becomes like a stiff paste and forms a meringue.
5. Mix in the flour and baking powder.
6. Gently add in the mixture from Step 1 and cook in a waffle maker.
7. Make the custard.
8. In a bowl, mix together the egg yolk and granulated sugar until it becomes white.
9. Sift in the flour and mix well.
10. Heat milk and vanilla beans in a pot.
11. Before it comes to a boil, turn off the heat and add the mixture from Step 3 in several batches.
12. Mix well.
13. Heat Step 4 on medium heat, stirring constantly.
14. When the edge of the mixture begins to bubble, use a whisk to smooth it out and remove from heat.
15. Pour Step 4 into a shallow container greased with butter and add butter on top as well.
16. Tightly wrap with plastic wrap and cool.
17. Put the custard into the waffle, cut into 2 or 3 parts and it's ready.
18. You can also wrap it decoratively to give as a gift.
19. If you want a chocolate waffle, in Step 2 add 1 tablespoon of cocoa powder to the batter and mix in.
20. Another version can be found here.

flour, sugar, vanilla oil, butter, egg, baking powder, milk, milk, flour, sugar, egg yolk, vanilla beans, butter

Taken from cookpad.com/us/recipes/171545-fluffy-and-crisp-waffle-custard-sandwich (may not work)