Preheat your oven to 180°C (350°F) and line a muffin tin with paper liners or lightly grease it.
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and pumpkin spice blend until evenly combined. This creates a light, airy dry mixture.
In a separate bowl, stir together the pumpkin, brown sugar, melted butter, and eggs until the mixture is smooth and fragrant, about 1-2 minutes. It should look slightly thick and velvety.
Gently fold the wet mixture into the dry ingredients using a spatula, just until they are combined. Be careful not to overmix; the batter should be thick but scoopable, with some small lumps.
Scoop the batter evenly into the prepared muffin cups, filling each about three-quarters full. Use an ice cream scoop for neat, consistent portions.
Bake in the preheated oven for 20-22 minutes, until the tops are golden and cracked slightly. Insert a toothpick into the center; if it comes out clean, the muffins are ready.
Remove the muffins from the oven and let them cool in the tin for about 5 minutes. Then, transfer them to a wire rack to cool slightly, revealing a tender, moist crumb with a fragrant aroma.
Serve the muffins warm or at room temperature, perhaps with a drizzle of honey or a sprinkle of cinnamon for extra coziness. Enjoy their tender, spiced goodness!