Mix 2.5 cups AP flour, 1 tbsp baking powder, 2 tsp sugar, 1/2 tsp kosher salt (if using salted butter use only 1/4 tsp), and 1/4 tsp cream of tartar in a mixing bowl then put it in the freezer with the butter
measure 1 cup of buttermilk and into the freezer. I am being extra carful to make sure everything stays cold so it is foolproof
The butter should be hard. Quickly grate the butter with a box grater then back to the freezer.
Dump the grated butter into the flour mixture and stir with a cold fork until it looks like large crumbs about 10 seconds. Pour in the buttermilk and stir it until the dough comes together.
Dump onto a floured surface and quickly knead until the dough is uniform. Back to the freezer.
Laminating-Take your dough and gently and quickly flatten the dough to a rectangle about 3/4-1 inch thick. Fold the dough in half turn it 90 degrees and repeat. Back to the freezer.Do this two more times. Back to you know where... This creates layers.
Flatten the dough to about 1 inch to make a regular biscuit. I was making smaller biscuits for sliders so I flattened it to about 5/8 inch so it was proportional. I used the can above as my cutter.
Big Tip! When cutting just push down. if using a knife just straight down and up, don't pull the knife. if using a cutter don't turn it. It will seal the edges and prevent layering and limit rising.
Place your cut biscuits on a baking sheet. If your cutting round biscuits quickly gather the scraps, flatten and cut more biscuits
Bake in 425 degree oven for 12 to 15 minutes until the tops are golden brown. If you want brush with melted butter