Meyer Lemon Biscotti

Name: Meyer Lemon Biscotti
Ingredients: 1 3/4 cup all-purpose flour; 1/4 cup almond flour; 2 teaspoons baking powder; 1/4 teaspoon kosher salt; 1 cup granulated sugar; 2 tablespoons Meyer lemon zest (very finely grated); 2 large eggs (at room temperature); 1/4 cup unsalted butter (melted and cooled to lukewarm); 1 tablespoon Meyer lemon juice; 1/2 teaspoon vanilla extract; 1/4 teaspoon lemon extract (optional); ½ ounce white chocolate (finely chopped); 6 tablespoons powdered sugar (sifted); pinch fine sea salt; 1 tablespoon Meyer lemon juice (plus more as needed); 1/8 teaspoon lemon extract (optional)