3 double batches of peanut butter fudge.

If you’re scaling a peanut butter fudge recipe:

• 1 batch = original recipe
• 1 double batch = 2× the original recipe
• 3 double batches = 6× the original recipe

So multiply every ingredient by 6.

For example, if one batch uses:

• 1 cup peanut butter
• 2 cups sugar
• ½ cup milk

Then 3 double batches would use:

• 6 cups peanut butter
• 12 cups sugar
• 3 cups milk

If you share the specific peanut butter fudge recipe, I can calculate the exact ingredient amounts for 3 double batches.