Apple and Carrot Shortbread

Name: Apple and Carrot Shortbread
Prep time: 10 min
Cook time: 1 h
Total time: 1 h 10 min
Cuisine: American
Ingredients: 1/4 cup / 2 ounces / 50g semolina flour; 1 1/2 cups / 6 ounces whole wheat pastry flour; 1/4 teaspoon baking powder; 1/4 teaspoon fine grain sea salt; 5 ounces (150g) unsalted butter, room temperature; 2/3 cup / 3 1/2 ounces (100g) light Muscovado sugar (or brown sugar); 2 ounces (50g) carrot, grated (about 1/4 cup); 1 ounce (25g) apple, grated (about 1/6 of a med. apple); zest of one lemon; milk