Preheat oven to 450.

In medium mixing bowl, whisk together flour, baking powder, baking soda and garlic salt.

Cut butter into flour using a fork (or your fingertips). Continue until you have a crumbly mix of flour coated large/medium butter pieces.

Add cheddar and green onion. Stir to combine.

Pour in buttermilk and mix until just combined. (Do not over mix here. You may need to add a little flour or milk to get a slightly sticky, but workable dough.)

Dump dough onto lightly floured counter top.

Flatten dough with lightly floured hands.

Cut dough into circles with a biscuit cutter (or a cup) and place round biscuit dough onto a greased baking pan.

Continue until all dough as been used.

Bake biscuits for 10 minutes or until golden brown on bottom.