Notes
If using unsalted butter, mix 1/4 teaspoon of salt into the flour before adding it to the wet ingredients.
Don’t add the butter until after adding the brown sugar and white sugar as the warm butter can cause the eggs to begin to cook. This will cause the possibly of having tiny bits of cooked scrambled eggs in the brownies.
I used a metal baking pan for this recipe. If you use a glass pan, the baking time may be slightly more as it takes glass longer to heat in the oven.
I don’t recommend using natural peanut butter with the oil that needs mixed in for these brownies. Natural peanut butter can easily separate and make the brownies feel a little oily.
To measure the peanut butter, first spray the measuring cup with spray cooking oil. The peanut butter then slides right out of the measuring cup.
Don’t heat the peanut butter for any more then 20-30 seconds or it can become too runny. If the peanut butter is too warm and runny it will make the peanut butter swirl look not as pretty on top of the brownies.