For the glaze, you can opt to make only a hibiscus-infused cream or a hibiscus concentrate, or you can use a mixture of both, like I did. For a creamier glaze, use about 3 1/2 to 4 tablespoons cream and no concentrate; for a tart glaze, use 2 1/2 tablespoons or so of concentrate and no cream. If your milk and yeast will not foam, you may need to scald the milk first (see this thread for more information). Heat the milk in a small saucepan just until the edges begin to simmer, then remove from heat and let cool to lukewarm, add the yeast, and proceed. To fry these like regular doughnuts, heat about one inch of neutral-flavored oil in a pot over medium heat to 375° or when small piece of dough bubbles cheerfully when dropped into the oil. Use a fish spatula or slotted spoon (or both together) to gently pick up a donut and place it in the oil. Cook, flipping once, until puffed and dark golden brown, 1 to 2 minutes per side. Drain on napkins or a baking sheet and let cool until just warm to the touch.
Find it online: https://tworedbowls.com/2015/09/01/baked-yeast-doughnuts/