01 -
Warm up your oven to 350°F. Grab your electric mixer and blend the cake mix, eggs, water, oil, and sour cream together for about 2 minutes. Don't forget to scrape the bowl halfway. Pour everything into a greased 9x13 pan.
02 -
Combine your brown sugar, cinnamon, and pecans (if you're using them) in a bowl. Scatter this mix over your batter, then grab a butter knife and make swirls until you see the sugar starting to sink in.
03 -
Make your topping by stirring brown sugar and cinnamon together, then dust it all over the top of your cake.
04 -
Stick it in the oven for 35-45 minutes. You'll know it's ready when you poke the middle with a toothpick and it comes out clean.
05 -
As your cake bakes, mix the powdered sugar, milk, vanilla, and salt until it's smooth. Once the cake comes out hot, pour this sweet glaze all over it.
06 -
Put foil over your hot glazed cake and let it cool all the way. This step keeps all the moisture and sweetness inside.