1 box Red Velvet cake mix, plus ingredients to make cake
2 (8-oz) packages cream cheese, softened
2 cups low-fat vanilla yogurt
1 cup powdered sugar
1 teaspoon lemon zest
2 pounds fresh strawberries
Preheat oven to 350F. Prepare cake batter as directed. Pour batter into a greased 13×9-inch pan.
Meanwhile, beat cream cheese at medium speed with a heavy-duty electric stand mixer 1 minute or until creamy. Add yogurt, powdered sugar, and lemon zest. Beat 1 to 2 minutes or until smooth, stopping to scrape down sides of bowl as needed. Cover and chill.
Remove cake from oven. Cool in pan on a wire rack 10 minutes. Remove from pan to wire rack, and cool completely (about 1 hour).
Invert cake onto a cutting board. Cut rounded top off of cake. Trim and discard edges of cake. Cut cake into 32 pieces. (If making individual trifles, you’ll want to cut the cake into smaller squares.)
Arrange about one-third of cake pieces in a 3-qt. trifle dish. Carefully spread one-third of chilled cream cheese mixture over cake. Add a layer of strawberries. Repeat layers 2 times, smoothing top layer of cream cheese mixture over cake pieces. Top with strawberries. Cover and chill 1 hour before serving. Garnish, if desired.