Combine all-purpose flour, sugar, instant yeast, kosher salt, and unsalted butter in a mixer bowl. Mix until a smooth, supple dough forms.
Let the dough proof until nearly doubled in size.
Form a butter block by pounding cold salted butter into a square shape.
Roll out the dough and encase the butter block in it, then fold the dough into thirds (letter fold).
Repeat the rolling and folding process (turns) a few times, incorporating sugar in the final turns.
Chill the dough, then roll it out and cut into squares.
Coat the squares in sugar, fold the corners in, and place in prepared muffin pans.
Proof the pastries in the fridge, then bake at 350°F for 25-30 minutes, rotating the pans halfway through.
Let the Queen Aman cool slightly before unmolding and enjoying the flaky, buttery pastries.
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