Preheat oven to 375 degrees and spray or line your muffin pan with parchment paper muffin liners.
In a medium bowl, combine flour, guar gum, soda, baking powder and spices. Whisk together and set aside.
In a stand mixer or a large mixing bowl, combine maple syrup, sugar, pumpkin, eggs, oil, milk and vanilla. You can use a paddle attachment or a whisk attachment to combine the ingredients.
Add the dry ingredients to the wet ingredients and mix together until combined and the batter is smooth.
Use a muffin scoop or measuring cup to pour the pumpkin mixture in the lined muffin tins.
If you wanted to add a crumble to your muffins - now is the time to sprinkle the crumble on top of the muffins! To make the crumble, combine all the ingredients in a mixing bowl and mix with your fingers or a fork until combined.
Pop into the oven for 15-17 minutes. Let the muffins cool in the muffin tin for 5 minutes, then transfer them to a wire rack.
Slather with butter and ENJOY!