MAKE THE DOUGHNUTS
Grease a large bowl with cooking spray.
Microwave-safe bowl or glass measuring cup, add milk.
Microwave until lukewarm, 40 seconds.
Add a teaspoon of sugar and stir to dissolve, then sprinkle over yeast and let sit until frothy, 8 minutes.
In a medium bowl, whisk together flflour and salt.
In a large bowl,whisk together remaining ¼ cup sugar, butter, egg, and vanilla.
Pour in yeast mixture, mix to combine
Add in dry ingredients, stirring with a wooden spoon until a shaggy dough forms.
Transfer to a lightly flfloured surface and knead until elastic and only slightly tacky
Adding more flflour a teaspoon at a time if needed, about 5 minutes.
Form into a ball then place dough in oiled bowl and cover with a clean dish towel.
Let dough rise in a warm spot until doubled in size, about 1 hour.
Line a large baking sheet with parchment paper and lightly grease with cooking spray.
Punch down dough, then turn onto a lightly flfloured work surface and roll out into a ½" thick rectangle.
Using a doughnut cutter or 3" and 1" biscuit cutters, punch out your doughnuts.
Knead any scraps together and punch out more doughnuts or holes.
Place doughnuts and holes onto baking sheets, cover with dish towel, and let rise again, 40 minutes to 1 hour more.
Grease basket of air fryer with cooking spray and add 2 doughnuts and 2 doughnut holes at a time.
Cook at 375°F for 6 minutes, until deeply golden. Place on cooling rack and repeat with remaining dough.
Dip doughnuts in glaze (see below) or follow instructions for cinnamon sugar.
MAKE THE VANILLA GLAZE:
In a medium bowl whisk together powdered sugar, milk, and vanilla until smooth.
MAKE THE CHOCOLATE GLAZE:
In a medium bowl whisk together powdered sugar, cocoa powder, and milk.
MAKE THE CINNAMON SUGAR
In a large shallow bowl, whisk together cinnamon and sugar.
Brush doughnuts with melted butter and toss in cinnamon sugar.