Easy Carrot Cake Squares

Ingredients for cake

• 1 ½ cups flour
• 1 teaspoon baking powder
• ¼ teaspoon baking soda
• 1 teaspoon cinnamon
• 2 eggs lightly beaten
• 2 ½ cups shredded carrots
• ¾ cups brown sugar
• ¼ cup granulated sugar
• ½ cup vegetable oil
• 1 teaspoon vanilla
• 1 cup chopped walnuts divided

Ingredients for frosting

• ½ cup unsalted butter room temperature
• 4 oz . cream cheese softened
• 1 teaspoon vanilla
• 1 ¾ cups powdered sugar