Ingredients

• nonstick cooking spray, for the loaf pan
• 2 cups all-purpose flour (see cook's note)
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon kosher salt
• 1 ripe large avocado
• 1 teaspoon lemon juice
• 3/4 cup sugar
• 1/2 cup half-and-half
• 1/2 teaspoon pure vanilla extract
• 1 large egg