Preheat oven to 350° F (175° C). Grease and flour a mini loaf pan.
In a small bowl, whisk together the flour, baking powder, and salt.
In a large bowl, mix together the butter and sugar. Beat in the egg then beat in the vanilla extract, lemon extract, and heavy whipping cream.
Add the dry ingredients to the wet ingredients. Stir in the lemon zest.
Pour batter into prepared loaf pan and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Allow to cool in pan for 10 minutes before removing to a wire rack to cool completely.
Notes
Only grate the yellow part of the lemon skin. Avoid zesting the bitter white pith underneath, as it can make your loaf bitterAdjust the milk as needed in the icing to get a thicker consistency that will stick to the top of the loaf.Mix the batter just until combined. Over mixing can result in a tough loaf.