Pour coffee and sugar into a sauce pan on medium heat. Heat until sugar dissolved. You want a runny, syrup consistency. You can add more sugar if desired.
Immediately pour 1/2 of the mixture into a 4-cup Pyrex bowl and set aside to cool down. Save the other half for later ;)
In a large bowl, combine eggs and condensed milk. Use a whisk and gently mix until eggs are incorporated. Be carful not to over mix or incorporate too much air as this will cause bubbles in the flan.
Add 1 Tbsp of vanilla extract ,1 1/4 cup milk, and 1/2 heavy cream - Stir until the mixed is well combined
Strain the flan mixture through a fine mesh strainer / sieve and discard the bits of egg whites. DO NOT skip this step, it will cause your flan to be lumpy and not smooth.
Pour the strained mixture into the Pyrex bowl with your coffee in it. Wrap it with one layer of foil on top (like a lid)
Pour 1 1/2 cups of water into the instant pot, place the trivet inside the pot, and place the Pyrex bowl on top. Seal the instant pot lid and set it for STEAM (High Pressure) for 23 minutes. Once it is done, wait an additional 10 minutes (natural release), then switch the knob from sealing mode to venting mode and open the lid carefully.
Carefully take the bowl out of pot and remove the foil. Let it cool down to room temperature for about 60-90 minutes.
Then cover and refrigerate for at least 6 hours or overnight.
Before serving, take a sharp knife and run it along the edges of the bowl to loosen the flan. Place serving plate on top and then flip the bowl over onto plate. Shake it if need to be to loosen the flan.
Cut a slice and pour some of that yummy coffee syrup over it