1 tsp. lemon zest and 1 tsp. lime zest

2 C. whipping cream

2 to 4 T. sugar, powdered sugar, or Splenda

Zest of 1 lime and 1 lemon

2 pints fresh or frozen blueberries

 

Prepare cake mix according to package directions. Stir the pistachios if using, lemon zest, and lime zest into the batter and bake as directed in a 9×13-inch pan. Allow cake to cool thoroughly. Cut cake in half and break up one half of the cake and place in bottom of a clear trifle bowl. Measure whipping cream and sugar into a medium bowl. Beat with an electric hand mixer on medium-high speed until mixture is slightly thick and fluffy (do not over-beat). Add the zest of lemon and lime and beat for 30 seconds. Spoon half of the whipped cream over the cake in bowl. Wash and dry blueberries. Spoon half of the blueberries on top of the cream in the bowl. Cut the second half of the cake to fit into the bowl, spoon remaining cream on top of cake and top with remaining blueberries. Note: Pistachios may be added to the cake batter or sprinkled over the first layer of blueberries in the bowl.