12extra-large egg whitesat room temperature for 30 minutes
1tablespoonfreshly squeezed lemon juice
1teaspoonpure vanilla extract
1 ½teaspoonscream of tartar
Accompaniments
Lightly sweetened whipped crème fraîche
Fresh berries
Instructions
Preheat the oven to 350℉.
In a medium bowl sift together the flour, ¾ cup of the brown sugar, and ¼teaspoon of the salt; set aside.
In the bowl of a stand mixer fitted with the whisk attachment, beat the egg whites with the lemon juice, vanilla, cream of tartar, and remaining salt on medium-high speed until they just hold soft peaks. Increase the speed to high and add remaining ¾ cup of brown sugar by tablespoons, beating until whites hold stiff glossy peaks, 3 to 5 minutes longer.
Transfer mixture to a large bowl to facilitate folding. Sift flour mixture over whites and fold in gently but thoroughly with a large rubber spatula.
Spoon batter into an ungreased tube pan with removable bottom, or line the bottom of a tube pan with a ring of parchment paper; smoothing the top. Run the spatula or a knife through the batter once to eliminate any air bubbles.
Bake until a cake tester or toothpick comes out clean, about 40-45 minutes. Remove from the oven and immediately invert the pan on its "legs" or over the neck of a wine bottle. Cool cake completely upside down for 1 to 1 ½ hours.
Turn the pan right side up. Run a knife around the edge and center of the pan. Invert or release the cake if using a removable bottom, then transfer to a plate. (Cake can be baked, cooled, and un molded 1 day ahead and kept well wrapped in plastic or foil at room temperature for 2 days.) Serve with sweetened whipped crème fraîche, and sliced fresh berries. Enjoy!
Notes
If your tube pan does not have "legs" to invert and cool the cake upside down, invert the pan over the neck of a heavy-bottom glass bottle.