Preheat oven to 350ºF

Mix flour, cocoa powder, baking soda, and salt in medium bowl.

Beat butter and sugar in large bowl with electric mixer on medium speed 5 minutes or until light and fluffy. Beat in eggs, one at a time. Mix in sour cream, milk, food color and vanilla. Gradually beat in flour mixture on low speed until just blended.

Spoon batter into 30 paper-lined muffin cups, filling each cup 2/3 full.

Bake 20 minutes or until toothpick inserted into cupcake comes out clean. Cool in pans on wire rack 5 minutes. Remove from pans; cool completely.

Vanilla Cream Cheese Frosting: Beat cream cheese, softened, butter, sour cream and vanilla extract in large bowl until light and fluffy. Gradually beat in powder sugar until smooth.