Giant Bakery-Style Banana Chocolate Chip Muffins Step-by-step instructions

Before you start

Before starting, bring the egg, butter, and sour cream to room temperature so they blend smoothly. Melt the butter and let it cool for a few minutes so it does not cook the egg.

Line a muffin tin with paper liners—use a jumbo tin with six cups or a standard 12-cup tin and fill only eight cups, leaving the empty cups halfway filled with water to prevent warping. Preheat the oven to 425°F after the batter has rested, not before, so the muffins go into a fully hot oven.

Instructions

Mix the Batter

1. 1Mash the bananas and mix the wet ingredients
   In a large glass bowl, mash the three ripe bananas with a fork until mostly smooth with a few small lumps. Add the granulated sugar, brown sugar, egg, melted butter, vanilla extract, and sour cream. Whisk everything together until the mixture is creamy and pale, about 30 seconds. Make sure the melted butter has cooled slightly so it doesn't cook the egg.
   Look for The mixture is smooth, pale, and slightly thickened, with no streaks of butter or egg.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Use very ripe bananas with brown spots for the most flavor and natural sweetness.
2. 2Add the dry ingredients
   Sprinkle the flour, baking soda, and salt over the wet mixture. Use a rubber spatula to fold everything together just until no streaks of flour remain. The batter will be thick and slightly lumpy. Fold in the chocolate chips, reserving about 2 tablespoons to sprinkle on top of the muffins before baking.
   Look for The batter is thick, cohesive, and just combined, with chocolate chips evenly distributed.
   Tip Do not overmix once the flour is added, or the muffins will be tough.

After this phase, the batter should be thick, smooth, and pale, with no streaks of flour or butter. The bananas are fully mashed, the sugars have dissolved into the wet mixture, and the chocolate chips are evenly distributed.

The batter should look glossy and slightly aerated from the whisking. It will be much thicker than a standard cake batter, almost like a very thick pancake batter, and it will hold its shape when scooped.

Rest and Fill

3. 3Fill the muffin liners
   Line a muffin tin with paper liners. Use a large ice cream scoop or a measuring cup to divide the batter evenly among the cups, filling each liner almost to the top. The batter should be mounded above the rim for the tallest domes. Sprinkle the reserved chocolate chips over the tops.
   Look for The liners are filled to the brim, with batter slightly domed above the rim.
   Tip For giant muffins, use a jumbo muffin tin with six cups, or fill a standard 12-cup tin with 8 muffins, leaving empty cups halfway filled with water to prevent warping.
4. 4Rest the batter
   Let the filled muffin tin rest at room temperature for one hour. This resting period allows the starches to hydrate and the baking soda to start working, which helps create a higher, more even dome and a tender crumb. Do not skip this step.
   Look for The batter may look slightly puffy and the chocolate chips may have softened a bit.
   Tip Cover the tin loosely with plastic wrap if you want to prevent a skin from forming on top.

After filling the liners and resting for one hour, the batter will look slightly puffy and the chocolate chips may have softened on the surface. The batter should still be mounded above the rim of the liners. The liners should be filled almost to the top, with the batter domed in the center. The kitchen will smell of banana and vanilla, and the batter will have a silky, thick consistency that does not spread much.

Bake and Serve

5. 5Bake at high temperature
   Preheat the oven to 425°F (220°C). Place the muffin tin on the middle rack and bake for 5 minutes. The initial high heat gives the muffins a rapid burst of steam that pushes the batter upward, creating a tall, bakery-style dome.
   Look for After 5 minutes, the tops are just starting to rise and the edges are barely golden.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Do not open the oven door during this first stage, as the temperature drop can deflate the muffins.
6. 6Lower the oven temperature and finish baking
   Without opening the oven door, reduce the oven temperature to 375°F (190°C) and continue baking for 15 minutes more. The muffins should be tall, golden brown, and a toothpick inserted into the center should come out with a few moist crumbs, not wet batter. The internal temperature of the muffins should reach at least 160°F (71°C).
   Look for The tops are deep golden brown, the edges pull away slightly from the liners, and the kitchen smells like bananas and chocolate.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip If the tops brown too quickly, tent loosely with foil for the last 5 minutes.
7. 7Cool and serve
   Remove the muffin tin from the oven and let the muffins cool in the tin for 5 minutes. Then transfer them to a wire rack to cool slightly. Serve warm so the chocolate chips are still molten and the crumb is extra tender. Split one open to show the moist interior.
   Look for The muffins feel firm to the touch and the chocolate is glossy and melted.
   Tip For the best texture, enjoy within a few hours of baking.

After baking, the muffins should be tall, with a golden-brown dome and edges that pull slightly away from the liners. A toothpick inserted in the center should come out with a few moist crumbs, not wet batter. The internal temperature should be at least 160°F (71°C). The chocolate chips on top will be glossy and slightly cracked. The muffins should feel firm when lightly pressed, and the crumb should be tender and springy.

Common mistakes

The most common mistake is overmixing the batter once the flour is added, which develops gluten and makes the muffins tough and dense. Another is skipping the one-hour rest—this short wait is what allows the batter to hydrate and the leavening to work, so do not rush it.

Opening the oven door during the first five minutes of baking lets out the steam and can cause the muffins to sink. Finally, overfilling the liners is not a problem here; the batter should be mounded high to achieve the tall dome.

How to tell it’s done

The muffins are done when they are tall, deeply golden on top, and a toothpick inserted into the center comes out with just a few moist crumbs clinging to it, not wet batter. The internal temperature should read at least 160°F (71°C) on an instant-read thermometer.

If the tops are browning too quickly, tent them loosely with foil for the last few minutes of baking. Let the muffins cool in the pan for five minutes before transferring them to a rack, so they set and do not stick to the liners.

• Egg dishes: 160°F (71°C) in the thickest part