Grease an 8-inch by 8-inch square baking pan. Then line it with parchment paper, large enough to allow it to hang over the side.
Cream the butter with sweetener and vanilla extract in a medium bowl, and mix the dry ingredients in another bowl (or a bigger bowl). Then add the creamed butter and sweetener mixture to the dry ingredients.
Rub the mixture between the fingers using bare hands to form a slightly sand-like sticky texture to distribute the butter evenly. Alternatively, use an electric mixer slowly to mix all the ingredients.
Test the mixture by pressing some into your palm; if it stays sticky and glues together, it’s ready to transfer to the pan.
Spread the dough evenly into the parchment-lined pan using a spatula and pat down to cover the entire baking pan from corner to corner.
Place the pan in the fridge and chill it for half an hour.
Remove the chilled dough from the fridge and carefully pre-slice the dough with a sharp knife or pastry cutter. I find it easier to make two horizontal cuts from left to right and five vertical cuts from top to bottom to form 18 biscuit shapes, like the ones you see in the Ted Lasso show.
Bake the dough in a preheated oven at 325 F for 25 mins.
Allow the biscuits to cool in the pan completely, then lightly loosen the edges with a knife before lifting them onto a chopping board with the parchment paper. Cut over the pre-cut slices to separate them.