M & M Christmas (or other times) cookie bars

Made these back in December.  They are good, but not great. 8.5/10.  I think I had to go longer than the time listed for baking, but can't recall now.  Obviously, I forgot to get a pic before we tasted them lol!

Link to original recipe: https://www.number-2-pencil.com/mms-christmas-cookie-bars-2/

Ingredients:

2 sticks of butter, softened
1 c. sugar
1 c. brown sugar (packed)
3 large eggs
1/2 T. vanilla extract
3 c. all-purpose flour
3/4 tsp. baking soda
3/4 tsp. salt
1 1/2 c. M&M's, plus additional for topping
1 c. mini semi-sweet chocolate chips, plus additional for topping
1/2 c. white chocolate chips

Directions:

1. Place an oven rack in lower third of oven.  Heat oven to 350°F.  Line a 9" x 13" baking dish with foil, leaving a little overhang all around.  Generously spray the foil with non-stick cooking spray.

2. In the bowl of a stand mixer, beat together butter, sugar, and brown sugar until light and fluffy (around 3-4 min).

3. Mix in eggs and vanilla extract.

4. Add flour, baking soda, and salt.  Mix at low speed until well combined.

5. Mix in M&M's and mini chips by hand.  Spread mixture into prepared baking dish, then top with additional M&M's, mini chips, and the white chocolate chips.  Press all toppings gently into dough.

6. Bake 35-40 min. on the oven rack in lower third.  Let cool completely, lift out with foil, then cut and enjoy!