Oatmeal Coffee Cake with Pecan Streusel

Ingredients

• 0.5 cup brown sugar
• 0.5 cup chopped pecans
• 3 tablespoons unsalted butter, at room temperature
• 2 tablespoons all-purpose flour
• 1.5 cups boiling water
• 1 cup rolled oats (not instant)
• 1.5 cups all-purpose flour
• 1 teaspoon baking powder
• 0.5 teaspoon baking soda
• 0.5 teaspoon salt
• 1 cup light brown sugar, packed
• 0.5 cup unsalted butter, at room temperature
• 2 large eggs, at room temperature
• 1.5 teaspoons vanilla extract
• 1 teaspoon ground cinnamon

Steps

1. Preheat the oven to 375 degrees F (190 degrees C). Grease and flour a 9×12-inch baking dish.
2. To make the streusel: Mix together brown sugar, pecans, butter, and flour in a small bowl until well combined. Set aside.
3. To make the cake: Pour boiling water over oats in a medium bowl. Combine flour, baking powder, baking soda, and salt in a separate bowl.
4. Beat brown sugar and butter together in a large bowl with an electric mixer until light and fluffy. Add eggs, one at a time, beating briefly after each addition. Scrape down the bowl and continue beating until mixture is smooth. Mix in soaked oats, vanilla, and cinnamon. Stir in flour mixture with a rubber scraper or wooden spoon. Pour batter into the prepared baking dish and cover with streusel.
5. Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 35 minutes.