Use equal measurements of butter as you would vegetable oil. You may need to convert to ounces or grams and find it easier to melt the butter before using so it mimics liquid oil. Add as the recipe directs.
Ghee
Use 1 Tbsp of ghee. Add as directed.
Canola oil/Rapeseed oil
Use 1 Tbsp of canola oil. Add as directed.
Sunflower oil
Use 1 Tbsp of sunflower oil. Add as directed.
Grapeseed oil
Use 1 Tbsp of grapeseed oil. Add as directed.
Olive oil
Use 1 Tbsp of olive oil. Add as directed.
Avocado oil
Use 1 Tbsp of avocado oil. Add as directed.
Peanut oil
Use 1 Tbsp of peanut oil. Add as directed. Be aware peanut oil has a high smoking point, so your brownies may cook faster.
Coconut oil
Melt the coconut oil until it becomes liquid, then use 1 Tbsp and add to the brownie batter.
Untoasted sesame oil
Use 1 Tbsp of untoasted sesame oil. Add as directed.
Nut butters
Use 1/2 to 1 Tbsp nut butter depending on how much flavor and chewiness you want. Add directly to mix or thin with some milk or water. You may want to thin out the nut butter if it’s particularly thick with a little water or milk.
Mashed banana
Use 1/2 Tbsp mashed banana. Mash the banana separately, then add it to the mix as directed.
Mashed Avocado
Use 1 avocado for every 1/2 cup of oil at a ratio of 2:1. Blend the avocado until smooth, then add to the mixture.
Applesauce
Use 3/4 cup of applesauce for every 1 cup of vegetable oil. Add to the mixture. Reduce the amount of sugar in the recipe as the apples are already naturally sweet.
Yogurt
Use 1 Tbsp of yogurt. Add as directed or thin with a little milk or water before adding.
Mayonnaise
Use 1 Tbsp of mayo. Add as directed.
Silken Tofu
Use 1/3 cup of silken tofu for every 1/2 cup of vegetable oil. Blend the tofu until it turns into a smooth liquid, then add to mix as directed.
Aquafaba
Use 1 Tbsp of aquafaba. Drain from the can or use pre-drained and add to the mixture as directed.