Romy's Baking and Cake Decorating

Bubby is graduating high school this year! It feels like I just dropped him off at preschool 5 minutes ago, and it's hard to even remember everything that happened in between. He's participated in an afterschool social group for the last two years, and yesterday was their farewell event. When they asked parents to send in snacks, I knew a cake was in order.  And I had all the ingredients in the pantry to make a Vanilla Sheet Cake.  Something I've actually never made before! I used  this recipe  from Joy of Baking. I used a Pyrex 9x13 glass pan, which is great for transporting cakes because it has handles and a lid. More on that later... The cake was supposed to take 35 minutes in the  oven but thankfully I checked at 33 minutes and it was ready to come out. In fact, it looked a bit overbaked, and I hope it wasn't dry. I took the cake out of the pan, which I'd lined with parchment, to cool on a rack so I could frost it faster. In the meantime, I made a simple van...