So, 1st time trying and I may have read too many recipes. I have a 12lb brisket. Made the brine with a little over a gallon of water and used like 8 teaspoons of pink curing salt. Realized about 3 hours later, meat already soaking, that it may be too much. Emptied it and started over using 2 1/2 teaspoons of the curing salt and rinsed the brisket before putting it back in its new brine. Anyone have thoughts on of I already screwed it up so bad I should throw everything away?
I went back over your post and realized I misread your teaspoon as Tablespoons (part of the reason I don’t use spoons curing meat, I weigh my ingredients)
A popular brine around here calls for 1 heaping Tablespoon of cure #1 per gallon of water.
After changing the brine out, you added 2 1/2 teaspoons of cure to 1 gallon.
One good way to apply cure to brine, is to add the meat weight and the water weight (water weighs 8.33 lb. per gallon)
Then apply 1 level teaspoon per 5# weight. In your case you have right about 20 total pounds so you should apply 4 level teaspoons to the brine.
Another better way to apply cure would be to apply by weight.
Here you have 20 pounds multiply that by 454 (grams in a pound)= 9080 grams. Cure #1 applied at 0.25% of total weight.
9080 x 0.0025= 22.7 grams cure #1