Best Lemon Poppyseed Cake Recipe - How to Make Lemon Poppyseed Cake

Ingredients

• Cooking spray, for pan
• 1 c. (2 sticks) butter, softened
• 1 1/2 c. sugar
• 3 large eggs
• 1 tsp. pure vanilla extract
• 2 c. all-purpose flour
• 3 tbsp. cornstarch
• 1 1/2 tsp. baking powder
• 1 tsp. kosher salt
• 1/2 c. buttermilk (or sour cream)
• 1/4 c. freshly squeezed lemon juice
• 4 tbsp. lemon zest
• 2 tbsp. poppy seeds
• 2 (8-oz) blocks cream cheese, softened
• 1/2 c. (1 stick) Butter, softened
• 5 c. powdered sugar
• 1 tbsp. pure vanilla extract
• 1 tsp. freshly squeezed lemon juice
• 1/4 tsp. kosher salt
• Lemon Slices, for garnish
• Lemon zest, for garnish