250gsifted cake flourAbout 2 1/2 cups. Can substitute 2 1/4 cups All-Purpose Flour sifted with 1/4 cup of cornstarch.
2teaspoons baking powder
½ teaspoon baking soda
1teaspoon salt
¾cup unsalted butterSoftened to room temperature
1 ¾cup granulated sugar
5 large egg whitesAt room temperature
⅓cup sour creamAt room temperature (can substitute plain full fat yogurt)
2 teaspoons pure vanilla extract
½cup whole milkAt room temperature (can substitute buttermilk but not lower fat milk)
½cup strawberry pureeIt is the first thing made in the recipe, but can be made a day or two in advance
Strawberry Cream Cheese Frosting
18 oz. block full-fat cream cheeseSoftened to room temperature
½cup unsalted butterSoftened to room temperature
3-6cupsconfectioners sugarStart with about 3 cups, but have more on hand to stiffen and adjust the frosting based on your location's humidity.
1-2Tbsp.whole milk
1teaspoonpure vanilla extract
saltTo taste
Instructions
Strawberry Puree
Wash and remove green parts of strawberries. Put them in a food processor or blender and puree until smooth. Each pound should yield about a cup of liquid. You need two cups for this recipe.
Put the puree in a pan over medium heat stir occasionally until reduced by half and quite thick (check out the video above to see the consistency you are aiming for). You will need 1 cup of puree, divided into 1/2 cup portions.
Allow the puree to cool completely. This is a great do-ahead step and will reduce your day-of cooking time by a lot.
Real Strawberry Cake
Preheat the oven to 350°F. Oil and lightly flour two 9-inch round cake pans. Or, use a baking spray. Set aside.
In a separate bowl, lightly whisk the dry ingredients (flour, soda, powder, salt) and set aside.
Using a stand mixer with the whisk attachment (or a handheld electric mixer) cream together the butter and sugar. About two minutes. Scrape down the sides and bottom as needed to fully incorporate the ingredients.
Turn the mixer to high and add the egg whites. Mix until combined. About two minutes.
Turn the mixer to low and add the dry ingredients. Mix until just combined then slowly add the milk. Again mix until just combined. You do not want to overmix the batter.
With the mixer still on low, add 1/2 cup of the strawberry puree and fully incorporate.
Pour batter evenly between the two prepared pans and bake 23-26 minutes. When you can lightly press the center of the cake and it springs back up the cake is done.
Set the pans on wire racks and allow cakes to cool completely before frosting and assembling.
Strawberry Cream Cheese Frosting
In a stand mixer fitted with a paddle attachment (or using a handheld electric mixer) cream the butter and cream cheese on medium-high until smooth, 1-2 minutes. Add the remaining 1/2 cup of strawberry puree and incorporate it into the butter and cream cheese mixture.
Add three cups of confectioner's sugar, one tablespoon of milk, vanilla extract, and a pinch of salt. Mix on medium until combined. If the frosting is too thin add more sugar until you get the desired consistency. If the frosting is too thick add more milk - as little at a time as possible.
Assembly
Before assembly, the bottom layer of the cake needs to be leveled. If you want a smooth top surface to your cake level it as well, but I do not mind the top of cakes to be domed so I usually skip this step. However, the cake will fit together better with the base layer flat. To do this use a serrated knife and trim off the dome. You could also use a cake leveler if you want to be very precise.
Place the base layer on your serving plate or stand and top with frosting. Evenly smooth it out to the edges. Top with the second layer and top with the remaining frosting. Evenly smooth across the top them work down and around the sides. An offset spatula will make this much easier.
You can eat immediately (it will be delicious) but letting it rest in the refrigerator for 30-45 minutes will let everything set up better. If you have any leftover cover and refrigerate for up to five days.
Notes
Make Ahead and Storage Tips:All the parts of this recipe can be made ahead and assembled within a few days. For cakes let cool completely then wrap in plastic wrap. They can be kept out at room temperature overnight or refrigerated for a few days. For the frosting, it can be covered and refrigerated. Anything refrigerated should be brought to room temperature before assembly.Cake rounds can be sealed and frozen for up to two months. When you are ready to use them move them to the refrigerator overnight then brought to room temperature before assembly.Cupcakes and Other Sizes:Cook time should be reduced for smaller baking items, like cupcakes, and increased for larger pans like 9x13 inch. Cakes are done when you can lightly press the center and they spring back up.