In one bowl add sugar, flour, cocoa, baking soda, baking powder, salt and cinnamon.
In a separate bowl, add milk, then eggs, and lightly whisk them together. Then add in the vegetable oil.
Add that bowl of wet ingredients into to the dry mixture and whisk.
Warm the hot water in a tea kettle or on the stove or microwave. I prefer using an electric tea kettle.
Preheat oven to 350 degrees.
Add the hot water to a mug with the instant coffee grounds, then add this to the mixture.
Add vanilla.
Whisk all the ingredients together.
After placing parchment paper at the bottom of both pans, add half of mixture to one 9 inch pan and half to another 9 inch pan. Use a food scale for a more accurate measurement of how much is in each pan.
Place on the same rack in the oven for 25 - 30 minutes. Stick a toothpick in the center after 25 minutes to check if its ready. If there is still a bunch of chocolate on the toothpick when you take it out, leave in the oven for another 5 minutes.
Once ready, immediately wrap cake in plastic/saran wrap and place in the fridge for at least an hour or overnight.