In a large bowl mix flour with the shortening. (I like to use my hands). Pour in the Buttermilk. Use a spatula or spoon to blend.
Once mixture is firm, (If mixture is still liquid add a little more flour -about 1/2 a cup) use your hands to knead and fold until the mixture forms a firm dough.
Place the dough on a floured cutting board or hard surface. Roll out dough and eventually put into the 9x13-inch baking pan. Press dough into the edges of the pan so the dough is laying flat and even across the pan.
Use a butter knife to cut 6 or 8 even squares into the dough. Make sure to leave half an inch of space between each square. Bake at 350°F for 15 - 20 minutes or until biscuits are slightly golden brown.
Melt butter either in a sauce pan or in the microwave. Drizzle melted butter on top of the hot biscuits. Serve with jam, honey or peanut butter (my husband's favorite).