Heat oven to 350°F. Grease bottom and side of 8- or 9-inch round cake pan with shortening; lightly flour.
In large bowl, mix flour, sugar, baking powder and salt until combined.
Add shortening, milk and cherry juice. Beat with electric mixer on medium speed 2 minutes, scraping bowl occasionally.
Add egg whites. Beat 2 minutes. Fold in cherries; pour into pan.
Bake 30 to 35 minutes or until cake springs back when touched lightly in center. Cool 10 minutes; remove from pan to wire rack. Cool completely, about 1 hour.