Preheat your oven to 350°F (180°C). This step is crucial as it ensures your muffins bake evenly. While the oven heats, you can prepare your muffin pan by lightly greasing it or lining it with paper liners. This makes for easy removal and cleanup.
In a medium bowl, beat unsalted butter and granulated sugar (or maple syrup) until pale and fluffy. This usually takes about two to three minutes with a hand or stand mixer. You want the mixture to become light and airy, which is vital for the muffin's texture.
Add the egg, mashed bananas, and vanilla extract to the bowl. Beat everything together for one minute until the mixture is well combined. The bananas should be well integrated, and the batter should look smooth and creamy.
Now it’s time to sift in the all-purpose flour, baking powder, baking soda, and salt. Mixing these dry ingredients is important for an even distribution throughout the batter. Beat until just combined, being careful not to over-mix, as this can lead to dense muffins.
Gently fold in the chopped strawberries and raisins, if you're using them. This step is where you get to see the vibrant colors of the strawberries coming through, making the batter look so inviting.
Divide the batter evenly among the muffin cups. A good tip is to use an ice cream scoop for uniformity. This will help your muffins bake evenly and look nice and fluffy once they’re done.
Bake the muffins for 18 to 20 minutes or until a toothpick inserted into the center comes out clean. You’ll want to keep an eye on them in the last few minutes; they should turn a beautiful golden brown.
Once they're done, cool the muffins in the pan for five minutes. This allows them to set before transferring them to a wire rack to cool completely. This step is key for maintaining that perfect texture.
Enjoy your freshly baked Strawberry Banana Muffins warm or at room temperature. They’re best enjoyed with a cup of tea or coffee, or simply by themselves!