1Replace the 1/4 cup of water requested by the box with 1/4 cup of milk.
2Substitute the 1/3 cup of vegetable oil with 1/3 cup of melted butter.
3Instead of one egg, use two egg yolks.
4Add a splash of artificial vanilla extract to the mixture.
5Include one large tablespoon of espresso powder to enhance the chocolate flavor.
6Mix the ingredients by hand, preferably with a wooden spoon, until just incorporated, being careful not to overmix.
7Prepare an 8x8 pan, preferably glass, or a non-stick pan lined with parchment paper.
8Preheat the oven to 325 degrees Fahrenheit for a non-stick pan or 350 degrees Fahrenheit for a glass pan.
9Bake the brownies for approximately 30-32 minutes, watching them closely to prevent overcooking.
10While brownies are baking, prepare the frosting by combining 1/2 cup of butter, 2 cups of icing sugar, 1/2 cup of cocoa powder, a splash of vanilla, and 2-3 tablespoons of milk.
11Mix the frosting ingredients, adding milk gradually until the desired consistency is reached.
12Once the brownies are baked and slightly cooled, spread the frosting over them.