1.   Slow at first, the motion gathered speed until it was too dazzling for the eye to follow.

2.   Beat mixture on low speed until combined.

3.   Beat at medium speed until soft peaks form.

4.   Beat the egg whites and cream of tartar at medium speed until soft peaks form.

5.   Beat at high speed until very glossy and stiff peaks form when beater is lifted.

6.   Beat the egg whites with the cream of tartar on medium speed until soft peaks form.

7.   Beat at high speed until stiff peaks form.

8.   Beat egg whites, salt and lemon juice with electric mixer at medium speed until peaks form.

9.   Beat on medium speed until pale yellow.

10.   Beat together butter and sugar at medium speed until light and fluffy.