Gluten-free Lemon Layer Cake

Ingredients (32)

• For Cake Layers:
• 2 1/2 cups Brown-Rice Flour Mix (recipe follows)
• 1/2 teaspoon salt
• 1 tablespoon baking powder
• 1 teaspoon xanthan gum
• 1 cup milk
• 1 cup canola oil, plus more for greasing pans
• 1 teaspoon pure vanilla extract
• 1 tablespoon finely grated fresh lemon zest
• 2 cups granulated sugar
• 4 large eggs
•  
• For Lemon Curd:
• 2 teaspoons finely grated fresh lemon zest
• 1/4 cup fresh lemon juice
• 1/4 cup plus 2 tablespoons granulated sugar
• 3 large egg yolks
• 1/4 teaspoon guar gum
• 1/2 stick unsalted butter, cut into tablespoon pieces
• 1/4 teaspoon lemon extract
•  
• For Lemon Frosting:
• 1 cup (2 sticks) unsalted butter, softened
• 3 1/2 cups confectioners’ sugar
• 1/4 cup fresh lemon juice
• 1/2 teaspoon lemon extract
• 2 teaspoons finely grated fresh lemon zest
•  
• Brown Rice Flour Mix:
• 2 cups brown-rice flour (extra finely ground)
• 2⁄3 cup potato starch
• 1⁄3 cup tapioca flour