Heat a large saucepan and melt the butter and bacon fat. Add the liquid smoke and stir it into the butter mixture.
Add the onions and saute them until they are translucent.
Add the potatoes and saute them with the onions for a minute or so.
Add the clam juice, milk, vegetable base, Old Bay seasoning, and salt. Taste for seasoning.
Reduce the heat and let the soup simmer for about 20 minutes or until the potatoes are fork-tender.
Add the clams, cream, and Tabasco and mix in thoroughly and simmer on low for about 5 minutes.
Put the soup in a nice tureen and serve.
Notes
If you like your chowder thick, you can make a roux with 1 tablespoon of butter and 2 tablespoons of flour mixed together and add at the end with the clams.
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