Preheat your oven to 350°F (175°C) and prepare a loaf pan.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
In a large bowl, cream the softened butter and sugar together until light and fluffy.
Add the eggs one at a time, mixing well after each addition, followed by the sour cream, lemon zest, and lemon juice.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined, then fold in the pistachios.
Pour the batter into the prepared loaf pan and smooth the top.
Bake in the preheated oven for 50-60 minutes, or until a toothpick inserted in the center comes out clean.
Allow the bread to cool in the pan for 10-15 minutes before transferring to a wire rack.
Once cooled, slice and enjoy your Pistachio Lemon Breakfast Bread.