In a large bowl, beat the butter and granulated sugar until light and fluffy.
3/4 cup (170g) unsalted butter, 3/4 cup (150g) granulated sugar
Beat in the eggs, one at a time, mixing well in between.
3 large eggs
Then beat in the sour cream, vanilla extract and lemon zest.
1/4 cup sour cream, 1 tsp vanilla extract, zest of 1 lemon
Add the dry ingredients to the wet ingredients and stir together until almost combined. Gently fold in the blueberries until just combined. Transfer the batter into the prepared loaf pan.
1 cup fresh blueberries
Bake for 60 minutes or until a toothpick inserted into the center comes out clean. Let cool for 10 minutes, then invert onto a cooling rack to cool completely.
Notes
Leftovers can be tightly covered and stored at room temperature for up to 3 days.To freeze - Cool completely and double wrap in saran wrap. Stored in the freezer for up to 3 months. Thaw overnight on the counter to bring to room temperature before serving.