Preheat your oven to 450°F. This high temperature is crucial for getting that initial rise in the muffins. While the oven heats, gather all your ingredients.
In a large mixing bowl, combine the all-purpose flour, baking soda, baking powder, and salt. Use a whisk or fork to mix them together until well blended.
In a separate bowl, mix together the melted butter, egg, and sugar. Stir until the mixture is smooth and creamy.
Add the diced pears to this wet mixture, gently folding them in until they are evenly coated.
Carefully combine the wet and dry mixtures. Using a whisk or wooden spoon, mix until just combined; be cautious not to over-mix.
Fold in the chocolate chips gently, ensuring they are evenly distributed within the batter.
If you're not using muffin liners, grease the muffin pan or spray it with cooking spray.
Using a spoon or cookie scoop, add about two tablespoons of batter to each muffin cup. Fill them about three-quarters full.
Place the filled muffin pan in the oven, then immediately reduce the heat to 375°F.
Bake for about 20 to 25 minutes. Check for doneness by inserting a clean toothpick in the center of a muffin; if it comes out clean, they are ready to come out of the oven.
