Start by preheating the oven to 425 degrees Fahrenheit (215 °C).
In a large mixing bowl, place the pumpkin, molasses, eggs, olive oil, vanilla, and orange juice. Whisk together until well combined.
In another bowl, place the whole wheat flour, sugar, baking powder, baking soda, salt, cinnamon, ginger, and cardamom if using. Use a whisk to mix everything together until well combined.
Pour the flour mixture into the pumpkin mixture. Use a spatula to fold the batter together just until combined, about 12 -15 folds.
In a muffin pan lined with muffin liners or greased, fill each muffin cup all the way up (about ⅓ cup). Bake at 425 Fahrenheit (215 °C) for 9 minutes, then turn the oven down to 375 degrees Fahrenheit (190 °C) and bake for another 9-11 minutes until the muffins are no longer gooey. Let the muffins sit in the pan for 5 minutes, then remove them from the pan.