My sister-in-law made the most wonderful cake last weekend. She said it was super easy to make, so I found the recipe and tried it myself. Surprisingly, it was easy! My favorite dessert is Boston Cream Pie, and this tastes just like it, but without all the effort of baking and icing layers of cake.
It only has 5 ingredients, and you don't even need to turn the oven on. Definitely my kind of cake :)

Mix 2 packages instant vanilla pudding, 3 cups milk, and one 8 oz tub of thawed cool whip in a bowl.
In a 9 x 13 pan, arrange a single layer of whole graham crakers on the bottom. Pour half the pudding/cool whip mixture on the crackers.

Add another layer of crakers on top of the pudding, and pour on the remaining pudding. Arrange one final layer of crakers on top of the last pudding layer.
Spread a can of chocolate cake frosting on the top layer of graham crakers. (I heated mine in the microwave for about 20 seconds to make it easier to spread).

Chill for about 4 hours before serving.
I took this over to our neighbor's for a cook out we had. I forgot to take my camera to capture their reactions to it. But I do know everyone there loved it.
Here's a printable version of the recipe.
2 (3.5 oz) packages instant vanilla pudding
1 (8 oz) container frozen whipped topping, thawed
3 cups milk
1 (16 oz) package graham cracker squares
1 (16 oz) can prepared chocolate frosting
In a medium bowl, thoroughly blend the pudding mix, whipped topping, and milk.
Arrange a single layer of graham crakers squares in the bottom of a 13x9 baking pan. Evenly spread half of the pudding mixture over hte crackers. Top with another layer of crakers and the remaning pudding mixutre. Top with a final layer of graham crackers.
Spread the frosting over the whole cake up to the edges of the pan. Cover, and chill at least 4 hours before serving.