Ok this is easy peasy.
Simply start with a box of Betty Crocker super moist French Vanilla cake mix.
Mix as directed on box EXCEPT replace the oil with 1 stick of melted butter and substitute 1 cup of fresh squeezed orange juice instead of water. Then bake as directed on the box.
Dreamsicle Cake baking in my 1940s Gaffers & Sattler range.
Cool the layers thouroughly after baking. I cool in the pans for 10-20 minutes, no more than 20 or they will stick, and then cool out on a towel or cooling rack out of the pan for at least another 30 minutes, preferably 1 hour.
Then make this simple orange butter creme icing:
1 box of powdered sugar, 1 teaspoon vanilla, 1/8 teaspoon salt, 1 stick of room temperature salted butter and 1/3 cup fresh squeezed orange juice. Place it all in a bowl and mix on low until mixed then mix on high until smooth and creamy (about 3 minutes). Once smooth & creamy, simply frost the cake!
Dreamsicle Cake
Simple, easy and delicious …Way!
Fearsome Beard 
ooooooooooooooooh, are you bringing that to mistress maddie’s green party? we could use more food! hurry over!
Simple, easy, and delicious – like your men?
Oh that sounds sooooo good right about now.
Pardon me while I mop up this drool.
Looks yummy. I need to overcome a fear of baking cakes.
Ah, you’re a MasterBaker!
Sounds yummy!