hot fudge sundae cake

whenever i don't have a lot of time and need a clutch recipe, this is one of the ones i almost always pick. it's insanely easy and i mean, it's cakey and puddingy (i know but how else do you say it? pudding-like? boring) and melty and it goes with ice cream. oh and did i mention chocolaty? i didn't, but i should have. CHOCOLATY. that should do it. i've tried so many molten chocolate recipes that just... sort of... fall flat. it's just not right for molten and chocolate to not work together. but this recipe kind of owns in that area. do yourself a favor and make this—your mouth, belly, family, friends, etc. will thank you.

1 c. flour
3/4 c. sugar
2 T. cocoa
2 t. baking powder
1/4 t. salt
1/2 c. milk
2 t. vegetable oil (i actually accidentally omitted this last time i made it and it was just fine without)
1 t. vanilla
1 c. packed brown sugar
1/4 c. cocoa
1 3/4 c. very hot water

heat oven to 350ºF. mix flour, sugar, 2 tablespoons cocoa, the baking powder and salt in ungreased square 9x9 pan. mix in milk, oil and vanilla with fork until smooth. spread in pan. mix brown sugar and 1/4 c. cocoa together then sprinkle over batter. Pour hot water over batter. bake 40 minutes.