Lavender and Honey Coffee Cake

Ingredients

• 1 1/2 cups all purpose flour
• 1/2 tsp plus 1/4 tsp baking powder
• 1/2 tsp plus 1/4 tsp baking soda
• 1 1/2 sticks unsalted butter at room temperature
• 1/2 cup granulated sugar
• 1/4 cup honey
• 1 lg egg plus 1 egg yolk
• 3/4 cup sour cream
• 1 tsp vanilla extract
• 1 Tbsp plus 1 tsp dried lavender
• 1/2 cup packed light brown sugar
• 1/2 cup chopped walnuts
• 1 tsp ground cinnamon