In a large bowl, stir together the sugar, flour, cocoa, baking powder, baking soda and the salt. Add the eggs, milk, oil and vanilla. Mix for 2 minutes on medium speed mixer. Stir in the boiling water last.
Bake for 30 - 35 minutes in the preheated oven. Test the cake with a toothpick. If done, cool in a pan for 10 minutes then remove to the wire rack to cool completely.
Everything1 1/2 tsp baking powder1 1/2 tsp baking soda1 tsp salt2 eggs1 cup milk1/2 cup canola oil2 tsp vanilla extract1 cup boiling water2 cup sugar1 3/4 cup plain flour3/4 cup cocoa powder