Preheat your oven to 350°F /175°C/ Gas Mark 4. Ensure your 8-inch tube pan is clean and completely dry, as moisture can negatively affect the cake.
In a mixing bowl, sift together the cake flour and 1/4 cup of granulated sugar. Repeat this sifting process two more times to ensure the flour is well aerated. Set this flour mixture aside. 1 cup Cake flour
In a large stand mixer bowl with the whisk attachment, beat the egg whites until they become frothy. Add the cream of tartar and salt to the egg whites. Continue to beat until soft peaks form. 1 ½ cups Egg whites, 1 1/2 tsp Cream of tartar, 1/4 tsp salt
Gradually add the remaining 1 cup of granulated sugar, about 2 tablespoons at a time, while continuing to beat the egg whites. Beat until stiff, glossy peaks form, and the sugar is fully incorporated. This may take about 5-7 minutes.
1¼ cups Castor sugar or fine-grain granulated sugar
Gently fold in the vanilla extract and almond extract (if using) into the egg white mixture.
1 tsp pure vanilla extract, 1/2 tsp almond extract
Carefully fold in the sifted flour mixture in small batches. Do this gently to avoid deflating the egg whites. Be thorough but gentle in your folding.
Spoon the batter into the ungreased 8-inch tube pan. Smooth the top with a spatula.
Bake in the preheated oven for 35-40 minutes or until the cake is golden brown and springs back when lightly touched.
Immediately invert the pan onto a bottle or a cooling rack to cool completely. This helps prevent the cake from collapsing as it cools. Allow the cake to cool upside down for at least 1 hour.
Serve the cooled cake with whipped cream and fresh berries.
1 cup Whipped cream, 1 cup Fresh berries