Preheat oven to 350 F. Line a loaf pan with parchment and spray with nonstick spray.
In a mixer bowl, cream together lemon zest, butter, and sugar, until light and fluffy, scraping down bowl as needed.
Beat in the eggs, one at a time, then add the vanilla paste.
in a separate bowl, combine milk and lemon juice
In a third bowl combine 2 cups of flour, salt and baking soda
Alternate adding flour mixture and milk mixture to the creamed butter, half at a time. Toss the blueberries in 1 Tablespoon flour, then gently stir them into the batter.
Line a loaf pan with parchment, then spoon in batter.
Bake until golden and a tester comes out clean, about 50-60 minutes.
Let cake cool completely then prepare the glaze. Melt the butter (I microwaved it), then whisk in the cream, vanilla and powdered sugar.
Drizzle over the pound cake. If icing gets too hard to drizzle, microwave unused glaze to thin it.
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I am not a health professional and nutrition data is calculated programatically. Accuracy may vary with product selection, calculator accuracy, etc. Consult a professional for the best information.