Step 1

In large mixing bowl, combine flours, yeast, and salt.

Step 2

In medium saucepan or large microwave safe bowl, combine melted butter, oil, brown sugar and milk. Heat to 120º to 130º.

Step 3

Add liquid ingredients to dry ingredients and blend on low speed until combine. Add eggs and vanilla. Beat 2 to 3 minutes on medium speed.

Step 4

Cover bowl; refrigerate batter several hours or overnight.