For butter blockAllow butter to soften to room temperature. Place between two pieces of parchment or wax paper. Using rolling pin, crush butter and roll out to 8”x6”. A spatula or bench scraper can be used to square off sides evenly. If butter gets too soft, it can be placed briefly in the fridge to unstick from parchment paper, but butter should be soft and pliable when enclosing in dough. To make doughWhisk together all dry ingredients (including quick rise yeast) in a large mixing bowl. Combine water and melted butter in a separate bowl. While mixer is running with paddle attachment, gradually add liquids. Allow dough to come together, then increase speed to medium and mix until very soft and evenly mixed, about 1-2 minutes. Remove from bowl and knead lightly to bring dough together. It should not be crumbly, so add more warm water if needed.
Place dough on floured surface and roll out to 14”x10”.
Brush off excess flour from top of dough and place butter block on bottom half of dough, leaving some space along bottom and sides of butter in order to seal dough. Fold top half of dough down over butter and seal dough all around butter block.
Give dough a quarter turn and roll out again after sealing butter. Continue flouring above and beneath the dough as necessary so dough does not stick. Roll out dough to 16”x10” to make first turn. If butter or dough gets too soft at any point, wrap and place in fridge for 30 minutes to an hour.
Once dough is rolled out to 16”x10”, brush off any excess flour and fold top of dough down towards the center of dough. Fold bottom half up towards the center as well (like a book). Brush off any excess flour again, and give the dough a quarter turn; fold top portion down and the bottom portion up again, like a book.
Repeat these book fold steps one more time. If necessary, wrap dough and refrigerate between folding in order to keep the butter from melting.
After completing second set of book folds, wrap dough and place in fridge for one hour.
Roll out dough again to 10”x25”. Using a pastry wheel, pizza cutter or a very sharp knife, mark dough along top and bottom at every 3” or for larger croissants at every 5”. Cut straight through from top to bottom marks. Leave as rectangular strips if making chocolate croissants. For plain croissants, cut diagonally across strips of dough to make long triangles.
Brush off any excess flour from dough before shaping, as the flour will make it more difficult to get the dough to stick to itself in shaping.