Starbucks Lemon Loaf Cake

1 box yellow cake mix
5.1 ounce instant or cook and serve Lemon pudding mix (can be replaced with instant vanilla pudding & 2 tsp lemon emulsion)
½ cup vegetable oil
4 large eggs
½ cup milk
8 ounces sour cream
6 tablespoons freshly squeezed lemon juice (from about 2-3 lemons)
Lemon Topping

½ stick butter, room temperature
2 cups powdered sugar
4 tbsp lemon juice
1 tsp lemon emulsion/extract

Make Lemon Loaf

Turn oven to 350F. Line 2 loaf pans with foil & spray with non stick spray, or butter and flour the pans. Set aside.
Combine all the wet ingredients and whisk until well combined.
Place all dry ingredients in a bowl, add about 1 cup of wet ingredients, beat with a mixer !on low speed! for about 15 seconds, then add the rest of the ingredients and beat on low speed for another 15-20 seconds. DO NOT over beat, or your cake will deflate.
Divide batter evenly between two loaf pans.
Place in the oven and bake for 45-55 minutes, until golden in color or until a toothpick inserted in the middle of the cake comes out clean.
Remove from oven and let rest in the pan for 5 minutes, before removing and allowing to cool on a cooling rack.

Make Icing

Beat butter, powdered sugar, lemon juice & lemon emulsion until smooth and supple.
Spread evenly on top of both cakes.
Allow the glaze to harden up before slicing.