Whisk together all wet ingredients and sugars. Stir the wet ingredients into the dry ingredients using a wooden spoon.
1/2 Cup Browned Butter, 1/4 Cup Vegetable Oil, 1 Cup Brown Sugar, 1/2 Cup Sugar, 3 Large Eggs, 1 3/4 Cups Apple Butter, 1/2 Cup Sour Cream
Pour into a greased pan and bake at 350 for 60 minutes.
For the Icing
In a small saucepan, bring the light brown sugar, milk, butter and vanilla to a boil, whisking to combine. Remove from the heat and sift in the powdered sugar.
3/4 Cup Light Brown Sugar, 6 Tablespoons Whole Milk, 3 Tablespoons Browned Butter, 1/2 teaspoon Vanilla, 2 Cups Powdered Sugar
Allow the icing to cool for 3-5 minutes, stirring occasionally, or until it has thickened, it should coat the back of a spoon.
The icing will set very quickly once slightly cooled, so work fast to get the loaf evenly iced. Pour the icing over the top of the loaf as quickly as you can until the surface is covered, doing your best to avoid layering the icing. See note.
Allow the icing to set for around 15 minutes before you slice.
Video
Notes
How to Brown Butter: Cut your room temperature butter into evenly sized pieces so that it melts evenly. I like to use a light colored pan so I can see the color of the butter and watch it change. Place the pan over medium heat. Stir the butter around to keep it moving while it melts.As it melts, you will start to see foam and sizzling around the edge and brown flecks will appear on the bottom of the pan. Remove it from the heat immediately. It should be very fragrant. You have made browned butter!Dividing the Butter: I brown all of the butter together, remove three tablespoons and set it aside for the frosting.Pouring the Frosting: You can pour the icing over warm bread loaves either in the pan or sitting on a wire cooling rack. You can also wait until the bread is cooled and pour the icing over.