Lemon Raspberry Bars

Ingredients

• 1 1⁄2 c. granulated sugar
• 8 T. unsalted butter, melted
• 2 large eggs, at room temperature
• 1 egg yolk, at room temperature
• 1⁄3 c. sunflower seed oil or other neutral oil
• 4 T. lemon zest
• 2 T. milk, at room temperature
• 2 t. real vanilla extract
• 1 1⁄2 c. bread flour
• 1 1⁄2 c. all-purpose flour
• 2 t. baking powder
• 1 t. baking soda
• 1 t. cinnamon
• 1 t. sea salt
• 12 oz. fresh raspberries
• 1 ½ c. powdered sugar
• 1 T. lemon zest
• 1 T. freshly squeezed lemon juice
• 1 - 3 T. milk, or more as needed to thin