• Preheat oven to 350 degrees F.
• In a large bowl, whisk together flour, sugar, baking powder, salt and set aside.
• In a separate bowl, lightly beat egg whites and add melted butter, greek yogurt, milk and vanilla extract. Mix well.
• Add egg mixture to flour mixture and stir until well combined.
• Grease 9 x 13 inch baking dish with pam. Pour batter into greased pan and bake for 20-25 minutes, or until toothpick comes out clean. Remove from oven and let cool completely.
• To make frosting, beat together butter and cream cheese until light and fluffy. Add powdered sugar, milk, vanilla and mix until smooth. Add green food coloring to icing a few drops at a time and mix until reaching desired color.
• Place shredded coconut flakes in zip lock bag and add green food coloring. Shake until coconut flakes turn green.
• Smooth icing over bars once bars have cooled completely and sprinkle coconut flakes on top of icing. Cut bars into squares and place candy eggs on top and enjoy!