Preheat over to 350 degrees.
In a 13 x 9 ungreased pan, unroll 1 can of crescent dinner rolls and stretch it out over the bottom of the pan. I find it easiest start inward and work outward. By the time you reach the edges, you should have plenty of dough to reach the edges of the pan.
In a large mixing bowl or using your stand mixer’s bowl, combine sugar and cream cheese and mix with electric mixer on low setting for about 15 seconds before adding vanilla and turning it up to medium speed. Continue to mix on medium until it’s nice and smooth.
Add M&M's and mix.
Spread the cream cheese mixture over the dough in the 13 x 9-inch baking dish.
Unroll the 2nd can of crescent dinner rolls and do the best you can to cover the top of the cream cheese mixture. Pinch together any openings, again working from the center outward.
In a small, microwave-safe bowl, melt the butter.
After butter is melted, add sugar and cinnamon and mix.
Spread the mixture over the top of your sopapilla bars. Try to get it as even as possible, it will be a bit difficult to get it perfectly, so just do the best you can.
Bake for about 25 to 30 minutes or until the middle is set.minutes,
Remove from oven allow to cool for about thirty minutes, and place in the fridge for 2 to 3 hours or until completely cool.
After it's cooled in the fridge, cut it into bars.