### Cinnamon Donut Loaf Recipe

#### Description
Indulge in the warm, comforting flavors of this Cinnamon Donut Loaf, a delightful treat perfect for breakfast, brunch, or a sweet snack. With a soft, fluffy texture and a crunchy cinnamon-sugar topping, this loaf is sure to become a family favorite!

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#### Ingredients
– **For the Loaf:**
– 2 cups all-purpose flour
– 1 cup granulated sugar
– 1 tablespoon baking powder
– 1 teaspoon baking soda
– 1 teaspoon ground cinnamon
– ½ teaspoon salt
– ½ cup unsalted butter, melted
– 1 cup buttermilk
– 2 large eggs
– 1 teaspoon vanilla extract

– **For the Topping:**
– ½ cup granulated sugar
– 2 teaspoons ground cinnamon

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#### Instructions
1. **Preheat the Oven**: Preheat your oven to 350°F (175°C).
2. **Prepare the Loaf Pan**: Grease a 9×5-inch loaf pan with butter or non-stick spray, or line it with parchment paper.
3. **Mix Dry Ingredients**: In a large bowl, whisk together the flour, 1 cup of granulated sugar, baking powder, baking soda, ground cinnamon, and salt until well combined.
4. **Combine Wet Ingredients**: In another bowl, whisk together the melted butter, buttermilk, eggs, and vanilla extract until smooth.
5. **Combine Wet and Dry Ingredients**: Pour the wet mixture into the dry ingredients and gently fold until just combined, being careful not to overmix.
6. **Transfer to Loaf Pan**: Pour the batter into the prepared loaf pan and smooth the top with a spatula.
7. **Prepare Cinnamon Sugar Topping**: In a small bowl, mix together the ½ cup of granulated sugar and 2 teaspoons of ground cinnamon.
8. **Add Topping**: Sprinkle the cinnamon sugar mixture generously over the top of the batter.
9. **Bake the Loaf**: Bake in the preheated oven for 50-60 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
10. **Cool the Loaf**: Remove from the oven and let cool in the pan for 10-15 minutes.
11. **Remove from Pan**: Run a knife around the edges to loosen, then invert onto a wire rack to cool completely.
12. **Slice and Serve**: Once cooled, slice the loaf and serve as is or with butter.
13. **Storage**: Store leftovers in an airtight container at room temperature for up to 3 days or freeze slices for up to 2 months.
14. **Enjoy**: Savor your delicious cinnamon donut loaf with family or friends!

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#### Notes
– Feel free to customize this recipe by adding nuts, chocolate chips, or a glaze for extra flavor.
– Ensure the melted butter is not too hot when mixing with the eggs to avoid cooking them.

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#### Prep Time
15 minutes

#### Cook Time
50-60 minutes

#### Total Time
1 hour 5-1 hour 15 minutes

#### Yield
1 loaf (approximately 10-12 slices)