Pumpkin Cinnamon Streusel Coffee Cake

Ingredients

• 2/3 cup all-purpose gold medal flour
• 1/2 cup packed light brown sugar
• 1 teaspoon ground cinnamon
• 1/8 teaspoon salt
• 6 tablespoons cold unsalted butter, cut into small chunks
• 1 1/2 cups all-purpose gold medal flour
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 2 teaspoons ground cinnamon
• 1/2 teaspoon ground ginger
• 1/4 teaspoon ground nutmeg
• 1/8 teaspoon ground allspice
• 1/2 teaspoon salt
• 1/2 cup unsalted butter, at room temperature
• 1 cup packed light brown sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 1/2 cup pumpkin puree (not pumpkin pie filling)
• 1/2 cup plain greek yogurt
• 1/2 cup powdered sugar, sifted
• 1/8 teaspoon ground cinnamon
• 2 teaspoons milk
• 1 teaspoon vanilla extract