Patriotic Berry Waffle Cake

Add cake mix, water, egg whites, and melted butter to a medium mixing bowl. Using a handheld mixer, mix on low for 30 seconds until combined. Increase the speed to medium and mix for 2 minutes.
Preheat your waffle maker. Once heated, add about a cup of cake mix to the waffle iron and gently spread to the edges. Close lid and cook. Repeat the process with the remaining cake batter. Place the cooked waffles on a wire rack to cool.
While the waffles are cooking, beat cream cheese for 2-3 minutes in a chilled medium mixing bowl until smooth.
Slowly add the heavy whipping cream until it's all combined with the cream cheese.
Continue beating on medium-high speed until soft peaks form.
Add powdered sugar and vanilla extract to the whipped cream and beat on medium-high speed until stiff peaks form (about 5-10 minutes). Refrigerate until ready to serve.
Assemble your cake by placing a waffle on a plate or stand and topping it with 1/5 of the whipped cream mixture. Spread the filling evenly to the edges. Place another waffle on top and repeat the process until you've used 5 waffles, making sure to leave enough filling to cover the top.
Decorate with fresh berries and powdered sugar. Keep refrigerated until serving.