Cake:

• 3 large eggs
• 1 cup granulated sugar
• 1/2 cup vegetable oil
• 1 1/2 cups buttermilk
• 1 tablespoon vanilla extract
• Zest & juice of 1 small lemon
• 2 cups all-purpose flour
• 1 (3.4 ounce) box Jell-O lemon instant pudding & pie filling
• 3 teaspoons baking powder
• 1 teaspoon kosher salt

Cinnamon Sugar Center:

• 1 cup packed light brown sugar
• 2 teaspoons ground cinnamon
• 1/4 teaspoon ground nutmeg
• Pinch of salt

Crumb Topping:

• 1 cup all-purpose flour
• 1/3 cup granulated sugar
• 1/3 cup packed light brown sugar
• 1 1/2 teaspoons ground cinnamon
• 1/2 cup (1 stick) butter, melted

Icing (Optional):

• 1 cup powdered sugar, sifted if lumpy
• 1 1/2 tablespoons milk of choice
• 1 tablespoon lemon juice
• 1 teaspoon vanilla extract