| 21. | At medium speed, slowly add powdered sugar and mix until fluffy.
|
| 22. | Cover and process at medium speed until smooth, about 15 seconds.
|
| 23. | Add sour cream and mix on medium speed for 30 seconds.
|
| 24. | In clean bowl, beat whites on medium speed until softly peaked.
|
| 25. | Using an electric mixer, beat the softened butter at medium speed.
|
| 26. | Beat at medium speed 1 to 2 minutes; pour over crust.
|
| 27. | Mix at medium speed until the dough forms a ball.
|
| 28. | With electric mixer, beat butter at medium speed until creamy.
|
| 29. | Beat cream cheese at medium speed of an electric mixer.
|
| 30. | Cream butter at medium speed until shiny, about 5 minutes.
|
