Step 1: Prepare the Oven

Preheat your oven to 350°F (175°C).

Grease a 9×5-inch loaf pan generously with butter or nonstick cooking spray.

For easier removal, line the bottom and two sides with parchment paper.

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Step 2: Mix the Dry Ingredients

In a medium bowl, whisk together:

• Flour
• Baking powder
• Salt
• Cinnamon

Mix until the cinnamon is evenly distributed throughout the flour.

Set aside.

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Step 3: Cream the Butter and Sugar

In a large mixing bowl, beat the softened butter and sugar together until light and fluffy.

This should take approximately 2–3 minutes with an electric mixer.

Creaming the butter properly helps create a lighter texture.

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Step 4: Add the Eggs

Add the eggs one at a time.

Beat well after each addition.

Add the vanilla extract and mix until combined.

The mixture should look smooth and creamy.

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Step 5: Combine the Wet and Dry Ingredients

Add approximately one-third of the flour mixture to the butter mixture.

Mix gently.

Add half of the milk and sour cream.

Continue alternating between the dry ingredients and wet ingredients until everything is incorporated.

Begin and finish with the dry ingredients.

Do not overmix.

Stop as soon as the batter is smooth.

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Step 6: Fill the Loaf Pan

Transfer the batter to the prepared loaf pan.

Spread it evenly with a spatula.

Gently tap the pan against the counter once or twice to remove large air pockets.

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Step 7: Bake

Place the loaf in the preheated oven.

Bake for approximately 45–55 minutes.

The top should be lightly golden and a toothpick inserted into the center should come out with a few moist crumbs.

Avoid overbaking because you want the inside to remain soft and tender.

If the top begins browning too quickly, loosely cover it with aluminum foil during the final 10–15 minutes.

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Step 8: Cool Slightly

Remove the loaf from the oven.

Allow it to cool in the pan for approximately 10 minutes.

Then carefully lift it out using the parchment paper.

Place it on a wire rack.

The loaf should still be slightly warm when you apply the cinnamon-sugar coating.

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🍩 Step 9: Prepare the Cinnamon Sugar

In a shallow bowl, combine the granulated sugar and cinnamon.

Mix thoroughly.

You want the cinnamon evenly distributed throughout the sugar.

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🧈 Step 10: Brush With Butter

Brush the entire outside of the warm loaf with melted butter.

Make sure you cover the top and sides generously.

The butter helps the cinnamon sugar stick to the loaf while also adding that rich, classic donut flavor.

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🍂 Step 11: Coat With Cinnamon Sugar

Immediately sprinkle the cinnamon sugar over the buttered loaf.

Rotate the loaf carefully so all sides are coated.

For an extra thick cinnamon-sugar crust, repeat the butter and cinnamon-sugar coating a second time.

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Step 12: Slice and Serve

Allow the coating to set for approximately 10–15 minutes.

Slice the loaf with a sharp serrated knife.

 

Serve warm or at room temperature.