
¼ cup unbleached all-purpose flour
2 tablespoons packed light brown sugar
2 tablespoons granulated sugar
¼ teaspoon ground cinnamon
3 tablespoons cold unsalted butter, cut into ½” pieces
Cake batter
2 large egg yolks
One 14-ounce can sweetened condensed milk
1/3 cup fresh lemon juice
2 teaspoons grated lemon zest
2 ¾ cups cake flour
1 teaspoon baking powder
½ teaspoon baking soda
½ teaspoon salt
3 large eggs
2 cups granulated sugar
1 cup canola or corn oil
2 teaspoons vanilla extract
½ teaspoon pure almond extract
1 cup sour cream
Powdered sugar for dusting the top of the cake
1. Mix the topping: Put the flour, brown sugar, granulated sugar and cinnamon in a medium bowl. Mix just to blend the ingredients together. Add the butter pieces and use a fork, pastry blender or your fingertips to break up the butter pieces, then mix them until crumbs form. Set aside.
2. Mix the cake: Position an oven rack in the middle of the oven. Preheat the oven to 325˚F. Oil the bottom, sides and center tube of a 9 ½- or 10-inch-diameter fixed bottom tube pan with at least 3 ¾” high sides. Line the bottom with parchment or wax paper and oil the paper.
3. Put the egg yolks, sweetened condensed milk, lemon juice and 1 teaspoon of the lemon zest for the lemon filling in a small bowl, stirring them until smoothly blended. Set aside.
4. Sift the cake flour, baking powder, baking soda and salt together onto a piece of wax paper or into a medium bowl. Set aside.
5. Put the eggs and granulated sugar in a large bowl and beat with an electric mixer on medium speed for about 2 minutes until the mixture looks fluffy, thickens and lightens to a cream color. This is the stage of the mixing that lightens the cake. Move the beaters around in the bowl if using a handheld electric mixer. Reduce the speed to low and slowly add the oil, vanilla, almond extract, and the remaining teaspoon of lemon zest, mixing until blended together. Mix in the flour mixture just until it is incorporated. Add the sour cream, mixing until it is blended and no white streaks remain. Use a rubber spatula to scrape about two-thirds of the batter into the prepared pan. Leaving about a ½-inch plain edge, spoon the reserved sweetened condensed milk and lemon mixture over the batter. Dipping a spoon about 1 inch into the batter, run it once around the lemon mixture in the pan to swirl it lightly through the batter. There should be dark yellow and marbleized streaks of lemon. Use a rubber spatula to scrape the remaining batter into the pan, spreading it evenly.
6. Bake and serve the cake: Bake 35 minutes. Gently sprinkle the reserved crumb topping over the top of the cake. Bake about 40 minutes more until a toothpick inserted in the center of the cake comes out clean. If the toothpick penetrates a large area of lemon filling, test another spot. Cool the cake in the pan for 15 minutes. Run a thin knife around the sides and center tube of the pan to loosen the cake. Turn the cake out onto a plate or wire rack. Carefully remove and discard the paper lining the bottom. Place a wire rack over the bottom of the cake and invert the cake onto it so the cake is crumb topping side up. Cool thoroughly. Dust the top with powdered sugar. Use a large spatula to slide the cake onto a serving plate.








