Preheat the oven to 350°F. Oil spray and line a 9X5-inch pan, then brush melted butter inside the pan. Set it aside.
Place the sugar in a bowl and add both lemon and lime zest. Massage the mixture. This helps to release the zest oil and aroma.
1 cup Sugar, 1 tablespoon Lemon zest, 1 teaspoon Lime zest
Set the mixer on the paddle attachment and beat the butter, oil, and sugar mixture for 2-3 minutes until the mixture is light, fluffy, and pale.
¼ cup Butter, ½ cup Oil
Add the eggs one at a time and mix well after each one.
3 Eggs
Add the extracts and mix well.
2 teaspoon Vanilla extract, 1 teaspoon Lemon extract
Add the sour cream and mix well.
¾ cup Sour cream
Juice the same lemon that you used its zest and add the juice to the batter.
2 tablespoon Lemon juice
In a separate bowl, sift the dry ingredients and add them to the batter in two additions.
2 cup All-purpose Flour, 1 teaspoon Baking powder, ½ teaspoon Salt, ¼ teaspoon Baking soda
Pour the batter into the lined pan and bake for 50-60 minutes. The top of the loaf will crack open. The loaf is ready when an insert comes out with just a few crumbs.
Let the loaf cool down in the pan for 15 minutes. Then, transfer to the cooling rack to cool completely.