Preheat oven to 350ºF. Lightly spray a 13x9 -inch baking dish with nonstick spray.
In a medium-size bowl mix together the flour, baking soda, salt, and cinnamon.
In another bowl mix together the granulated sugar, brown sugar, apple sauce, eggs, and vanilla extract.
Add the wet ingredients to the dry ones in 2 batches, until the batter is well mixed.
Fold in the white chocolate chips and the dried cranberries and mix well. Spread the batter onto the baking pan and press down with the back of a spatula to even out the batter.
Bake for 15-20 minutes in the preheated oven until the edges are golden brown and an inserted toothpick comes out clean. Let it cool completely.
Meanwhile, prepare the cream cheese frosting; in a large bowl beat with a hand mixer the cream cheese, greek yogurt, powdered sugar, and vanilla extract until well blended. Frost the (cooled down) bars with the cream cheese frosting and add the sprinkles or sprinkle the chopped dried cranberries to the top of the bars. Drizzle with the melted white chocolate.
When the white chocolate cools down and sets, cut into 9 large squares, then cut the squares diagonally to create triangles. Store in the refrigerator until ready to serve. Enjoy!