Preheat oven to 350 degrees.

In a medium sized bowl, add melted butter, granulated sugar and brown sugar and mix with your hand mixer on medium speed.

Add eggs one at a time, mixing after each addition to incorporate. Mix well!

Mix in oil and vanilla extract.

Combine flour, cocoa powder, baking soda if using and salt in a bowl. Reduce speed of mixer.

In intervals, add flour mixture to wet mixture until all ingredients are incorporated.

Add brownie batter to baking non-stick sprayed 8x8 sized baking pan.

Bake for 30 minutes or until a toothpick inserted into the center comes out just barely clean. Don’t overbake.

Remove brownies and cool on cooling rack. Cut and serve.