Easy Almond Sponge Cake

1 cup cake flour
1/2 cup sugar substitute, divided
10 egg whites, at room temperature
1 1/4 teaspoons cream of tartar
1 teaspoon vanilla extract
1/4 teaspoon almond extract

• Place the flour the 1/2 of the sugar in a sifter and sift together in large mixing bowl.
• Place the egg whites in another mixing bowl. Add the cream of tarter and beat on high speed with an electric mixer.
• Add half of the remaining sugar and continue to beat for 1 minute.
• Add the rest of the sugar and beat again for 1 minute.
• Stir in the almond and vanilla extract.
• With a rubber spatula mix together the flour mixture and the egg mixture.
• Place the oven temperature to 350 degrees and allow the oven to heat up.
• Place the batter in an ungreased cake pan.
• Bake 45 minutes or until the cake bounces back easily when lightly touched.