Add <quantity>140<unit>ml</unit></quantity> of warm whole milk, <quantity>140<unit>ml</unit></quantity> of warm water and <quantity>500<unit>g</unit></quantity> of all-purpose flour to a stand mixer bowl

Add <quantity>60<unit>g</unit></quantity> of white sugar and <quantity>12<unit>g</unit></quantity> of salt

Add <quantity>40<unit>g</unit></quantity> of softened, unsalted butter and <quantity>11<unit>g</unit></quantity> of fresh yeast

Mix with the dough hook attachment on low speed for 4m until the dough comes together and forms a ball

Mix the dough on medium-high speed for 6m until the dough becomes smooth and elastic

Place the dough on a clean work surface and shape it into an approximate square

Place the dough on a baking tray with parchment paper and cover it with cling film. Place it in the refrigerator for 12h to rise

Place <quantity>280<unit>g</unit></quantity> of softened, unsalted butter on a sheet of parchment paper. Form a rectangle that is about <quantity>1<unit>cm</unit></quantity> thick. Reserve in the refrigerator

Remove the dough from the refrigerator. Dust it with all-purpose flour and place it on a floured surface. Remove the paper and dust the other side of the dough

Roll the dough into a <quantity>26<unit>cm</unit></quantity> x <quantity>26<unit>cm</unit></quantity> square

Dust the butter with all-purpose flour and roll it until the rectangle is <quantity>25<unit>cm</unit></quantity> long

Place the butter in the center of the dough. Fold the dough to meet in the middle, without overlapping

Roll the dough, lightly pressing it with only forward and back movements to make a narrow rectangle

Fold one end of the dough in about <quantity>5<unit>cm</unit></quantity>. Fold the ether end, slightly overlapping the first fold. Fold the dough in half and rotate it. Roll it with light pressure to press the folds together

Place the dough on a baking tray with parchment paper. Cover it with cling film and refrigerate it for 30m to relax it

Take the dough out of the refrigerator and let it warm up to room temperature. Lightly dust it with all-purpose flour and roll it back and forth. Apply light, even pressure until it is <quantity>1<unit>cm</unit></quantity> thick

Fold the dough in thirds and roll it with light pressure to press the folds together

Place the dough on a baking tray with parchment paper. Cover it with cling film and refrigerate it for 30 minutes to relax it

Add <quantity>1<unit>cup</unit></quantity> of softened butter, <quantity>¼<unit>cup</unit></quantity> of white sugar, and <quantity>1<unit>tsp</unit></quantity> of salt to a stand mixer bowl

Add <quantity>2<unit>tbsp</unit></quantity> of cinnamon powder and <quantity>1<unit>tsp</unit></quantity> of ground coffee

Whip with the paddle attachment on medium-low speed for 10m, scraping down the butter periodically until it gets fluffy

Transfer to a clean bowl. The cinnamon butter is ready

Roll the dough, using light pressure, into a <quantity>1<unit>cm</unit></quantity> thick <quantity>20<unit>cm</unit></quantity> x <quantity>110<unit>cm</unit></quantity> rectangle. The croissant dough is ready

Cover the whole dough with a thin layer of the cinnamon butter

Roll the dough horizontally

Cut the roll into <quantity>3<unit>cm</unit></quantity> thick pieces

Melt butter and grease the muffin pan generously

Preheat the oven to <temperature>240<unit>°C</unit></temperature>

Transfer the cruffins to the muffin pan, leaving room for them to grow without touching each other during proofing. Mix <quantity>1</quantity> egg with <quantity>1<unit>tbsp</unit></quantity> of milk to make an egg wash and brush the cruffins

Proof the cruffins draft-free for 2h at an ideal temperature of <temperature>25<unit>°C</unit></temperature>. You should be able to tell if they are ready by carefully shaking the muffin pan and seeing if they wiggle a bit

Give each cruffin a second brush with the egg wash and bake them for 11m at <temperature>200<unit>°C</unit></temperature> until slightly golden

Turn the heat to <temperature>220<unit>°C</unit></temperature> and bake them for another 4m. This changes per oven, so make sure to bake for at least 15m total until cooked through and golden brown

While still hot, roll the cruffins in a mixture of <quantity>1<unit>cup</unit></quantity> of sugar and <quantity>1<unit>cup</unit></quantity> of cinnamon powder. The cinnamon cruffins are ready

Enjoy!