Prepare all ingredients for the cake. Coffee is not part of this picture, it is an optional choice.
In a large bowl, whisk eggs. To the eggs, add milk, vanilla extract and oil. In a small bowl, combine together lemon juice and baking soda. Add soda mixture into the egg mixture.
In a separate bowl, combine flour together with sugar.
In small parts, add flour mixture into the liquid mixture. Stir to combine the mixture well together.
In a separate bowl, combine brown sugar with cinnamon and instant coffee.
Brush an 11 inch baking pan, pour half of the the cake batter into the pan. Sprinkle half of the brown sugar over the cake batter.
Pour the remaining batter into the baking pan and sprinkle it with the remaining brown sugar. Pour melted margarine over the top of the cake.
Bake cake at 350F for 30 minutes. Remove from the oven and let it cool to a room temperature.