on stove top, you’ll need more water and salt than the recipe calls for; most of it will be drained off
in a small saucepot on the stove, gently melt butter and garlic; let simmer on low to infuse ~1-3 minutes
add heavy cream and continue to leave on a low simmer; do not boil
once pasta is cooked, turn off the heat and drain the water, reserving about a cup
add warm cream mixture and parm to the pasta and stir vigorously until everything is melted and has transformed into a creamy sauce, up to 5 minutes is fine
add black pepper, lemon juice, and any additional seasonings if using
Instant Pot
add pasta, water, and salt to inner pot, stir and make sure all the pasta is covered with water
pressure: high time: 3 minutes release: 5 minutes natural
in a small saucepot on the stove, gently melt butter and garlic; let simmer on low to infuse ~1-3 minutes
add heavy cream and continue to leave on a low simmer; do not boil
when 5 minutes of natural release is done, manually release remaining pressure
it may foam and froth a bit from the release valve, you can cover with a tea towel or release steam more slowly
there will be ~2 cups of pasta liquid in the pot, drain about half
add the cream mixture and parm; stiir vigorously until a creamy sauce is formed, ~5 minutes
add black pepper, lemon juice, and any additional seasonings if using
Notes
if the sauce is too thick, thin with some of the pasta water, milk or regular water (whatever you have on hand)
can also use milk or half and half if you don’t have cream, but may have to cook down longer to thicken
both the pasta water and parm are salty, so do not add any additional salt until the end, after tasting; at that point, adjust to your preference (I don’t add any)
Instant pot instructions will make pasta slightly past al dente; if you prefer firmer pasta, pressure cook for a minute less
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