Preheat oven to 350 degrees F.  Line 1 or 2 baking sheets with parchment paper.  The amount of sheets you use will depend on how many biscuits you cut by size.

Cut butter up into pieces and place in a large bowl.  Add the non-fat dry milk and the stock cube.  Pour the hot water over this and mix until butter is melted.

Add the flour and mix well, forming a dough you can roll.

On a lightly floured surface, roll out dough to 1/4-inch thickness and cut into desired shapes.  Prick with a fork. Place on prepared sheets.

Bake at 350 degrees F for 45-50 minutes.  Turn off the oven and let the biscuits sit in the oven until completely cool.  This helps to dry them for storage.

Amount is variable, but I get about 2 dozen 3-inch bone-shaped biscuits.