Donuts:
½ cup milk – lightly warmed
1 (7g) packet of active dry yeast
2 Tbsp sugar
1 egg
½ tsp vanilla extract
2 Tbsp butter – softened
2 cups all-purpose flour
½ tsp salt
Canola oil for frying
Custard Filling:
⅓ cup sugar
Pinch of salt
2 ½ Tbsp all-purpose flour
1 cup milk
3 egg yolks
1 tsp vanilla extract
Burnt sugar crust:
½ cup sugar
2 Tbsp water