Preheat oven to 425 degrees Fahrenheit.

In a large bowl, sift together all-purpose flour, baking powder, and salt.

Cut in chilled vegetable shortening with a pastry blender until well incorporated.

In a separate small bowl, whisk together mashed cooked sweet potatoes and 3/4 cup of cold milk until blended.

Gradually stir the sweet potato mixture into the flour mixture until just blended.

Avoid over-mixing the dough.

If the dough is too dry, add the remaining milk, one teaspoon at a time, until the dough sticks together.

Place the dough on a lightly floured surface.

Knead the dough 8-10 times.

Roll the dough out to 1/2 inch thickness.

Cut out 2-inch biscuits.

Bake at 425 degrees Fahrenheit for 8-10 minutes, or until golden brown.

Serve and enjoy!