Why Miffins Get Pointy Centers

From Google AI:

Pointy centers or peaked tops in muffins are caused by several factors, generally related to how the batter cooks and rises:

Heat Distribution: A primary reason for pointy tops is the uneven heating of the muffin batter in the oven.

• The edges and sides of the muffin, being in direct contact with the hot muffin tin, cook and set quickly.
• The center takes longer to heat and set, allowing it to continue rising while the outer parts have solidified.
• A higher oven temperature exacerbates this difference, leading to more pronounced peaks.

Gluten Development and Gas Trapping:

• Overmixing the batter can lead to overdeveloped gluten, which creates a stronger network that traps more gas and steam.
• This trapped gas expands during baking, pushing the batter upward, especially in the center where it's still soft, resulting in tall, pointy tops.
• Overmixing can also create "tunnels" or large air bubbles inside the muffin.

Too much batter: Overfilling the muffin cups can lead to the batter overflowing and creating misshapen, peaked tops.

Oven temperature: An oven that is too hot can cause the muffin to set too quickly on the outside, forcing the center to rise excessively.

Too much leavening agent: Excessive baking powder or baking soda can also lead to a rapid and exaggerated rise, resulting in peaked tops.

In summary, pointy centers are a consequence of the heat and leavening causing the center of the muffin to rise faster and higher than the outer edges, which have set more quickly.

To avoid this, ensure your oven is preheated to the correct temperature, do not overmix the batter, and fill the muffin cups appropriately.