Preheat oven to 350F degrees.
In a large mixing bowl, start with just the batter ingredients and using an electric hand mixer, beat together the butter and 1 cup Florida Crystals® Organic Raw Cane Sugar until light and fluffy.
Add in the eggs and vanilla extract and mix until incorporated.
Next, add in the flour, baking soda, baking powder, and sea salt. Mix well.
Then, add in the sour cream and mix until everything is smooth and incorporated.
Using a sharp knife, chop the nuts into small pieces.
In a small bowl, combine the filling ingredients: walnuts, pecans, 1 cup Florida Crystals® Organic Raw Cane Sugar, ½ cup Florida Crystals® Organic Light Brown Raw Cane Sugar and the cinnamon and mix together well.
Spray a 9in baking pan with oil or spread with butter.
Add half the batter to the pan and level out on the bottom of the pan.
Next, add in half of the filling ingredients and make sure it covers all the batter.
Repeat again with the rest of the batter first and then the last of the filling mixture on top.
Bake the coffee cake at 350F degrees for about 60 minutes.
Make sure to check the cake around 50 minutes and bake until a toothpick comes out clean.