It depends what you consider easy. When you bake all day, whipping a cake together can sometimes feel like one of those moments where you think "I have ten minutes before the meeting starts, yeah I'll make a cake." But when we all think back to when we first started baking, cakes never seemed that easy.
I am going to suggest Donna Hay as some of the easiest from-scratch cake recipes. I have some that only take a few more steps and are better, but she has some that are just so simple it can be a good place to start. Most libraries will carry some of her books, but here is a super-easy white chocolate cake -
6 oz butter
1 cup milk
1 1/2 cups sugar
5 oz white chocolate, chopped
2 cups flour
1 1/2 tsp baking powder
1 tsp vanilla
Preheat oven to 325. Place the butter, milk, sugar and chocolate in a saucepan over low heat and stir until melted and smooth.
Place the flour, baking powder, vanilla and eggs in a bowl. Add the chocolate mixture and whisk until smooth. Pour the mixture into a 9-inch pan that is sprayed with baking spray. Bake for 50 minutes or until a toothpick inserted in the center comes out clean. Cool.
If you read this and think you are looking for something slightly more advanced, let me know, I have that, too.