Chess Bars - Ooey Gooey Butter Bars

Ingredients

• buttery cooking spray
• 1 box sugar free yellow cake mix (We used Pillsbury Zero Sugar Moist Supreme Classic Yellow Cake Mix.)
• 2 scoops (2/3 cup) vanilla protein powder (We used Premier Protein Whey Protein Powder.)
• 2 large egg whites
• 2/3 cup fat free Greek yogurt
• 2 tsp. vanilla extract
• 1 tsp. imitation butter extract
• 1 block (8 oz.) 1/3 less fat cream cheese at room temperature
• 3 large egg whites
• 1 large whole egg
• 3 1/2 cups sugar free confectioners sugar (We used Swerve Confectioners Zero Calorie Sweetener.)