Spray a madeleine pan generously with non-stick spray. Set aside.
Place eggs and sugar in a mixing bowl.
Using the wire whisk attachment of your stand mixer (or use your hand mixer) beat eggs with sugar for 6-7 minutes or till doubles in volume and looks pale in color.
Add instant coffee, vanilla extract, salt and mix to combine.
Add flour and melted butter alternately, mixing after each addition.
Mix the batter till it looks smooth and well combined.
Fill each cavity of the madeleine pan 3/4 full.
Bake at 350 F degrees for 9-10 minutes till the edges crisp up a little and center is set.
Remove from oven, let them sit in the pan for few minutes and then use a knife to remove them gently from the pan.
Place chocolate chips in a bowl. Pour hot cream over it. Let it sit for 2-3 minutes.
Then use a whisk to combine the chocolate and cream together. All the chocolate would have melted by now.
Dip the madeleines in the prepared chocolate ganache.
Decorate with sprinkles (optional) and let the ganache set completely.