Preheat the oven to 400 degrees. Line a cookie sheet with parchment paper.

In a large bowl combine the flour, salt, baking powder, baking soda, sugar, and garlic powder.

Cut the butter into pieces. Drop in the flour mixture and use your hands to mix it into a crumble.

In a small bowl combine the egg and sour cream. Pour into the flour mixture and mix until a dough begins to form.

Add in the zucchini and 1/2 cup of cheddar cheese and mix until a shaggy dough forms.

Turn the dough onto a floured surface. Knead until the dough comes together. Pat the dough into a 1 inch tall circle.

Cut into 8 pieces. Transfer the pieces to the prepared cookie sheet.

Sprinkle the top with the remaining cheddar cheese.

Bake for 22-24 minutes. Remove from the oven and cool completely.