White and Dark Chocolate Blood Orange Cookies

INGREDIENTS

• 1 1/4 cups (285 g or 2 1/2 sticks) unsalted butter
• 2 medium blood oranges
• 2 1/4 cups (515 g) dark brown sugar
• 1/2 teaspoon ground cinnamon
• 2 large eggs
• 1 tablespoon vanilla extract
• 1 1/4 teaspoon baking soda
• 1 1/2 teaspoon baking powder
• 1 1/2 teaspoon sea salt
• 2 cups (300 g) white whole wheat flour
• 1 3/4 (240 g) superfine semolina flour
• 1/2 cup (65 g) whole milk powder
• 8 oz (225 g) semi-sweet chocolate chips
• 8 oz (225 g) white chocolate chips
• coarse sea salt