Preheat oven to 176C.
Grease and flour bundt pan.
Prepare your streusel by adding all the ingredients marked * into a mixing bowl.
Use 2 fork to mash/mix everything together until it looks like wet sand.
Whisk flour, cinnamon, nutmeg, salt, and baking soda together
In your mixer, beat butter and sugar until fluffy.
Add eggs one at a time and mix.
Add sour cream, pumpkin, and vanilla extract.
Beat until combined.
Then gradually beat in flour mixture, until just combined.
Pour half the batter into prepared bundt pan.
Spoon the streusel in the middle of the batter. Careful not to touch the sides!
Then pour in the rest of the cake batter.
Bake for 55-60 mins until skewer comes out clean.
Allow to cool in pan for at least 20 minutes before turning it out on a wire rack.
Allow cake to cool completely before glazing.
{Glaze}
Stir 1-2 tbsp of milk into the icing sugar until smooth.
Then add more milk slowly until desired consistency.