Add chicken stock to a medium pot and cover. Bring to a boil, then turn down heat and simmer until ready for use.
In a dutch oven over medium heat, melt 1Tbsp butter and olive oil.
Add chopped onions and reduce heat to medium-low. When onions are cooked through, add the minced garlic and cook ~20 seconds.
Add arborio rice to the pan and cook until clear with only a white dot in the middle; listen for a popping sound. Stir continuously.
Add wine ½ cup at a time and stir constantly, until pulling your spoon through the mixture and liquid does not fill the empty space.
Add heated chicken stock ½ cup at a time and cook until absorbed, using the same spoon test as for the wine.
When adding the final 1 cup of stock, add the riced cauliflower and cook down using the same spoon test.
Remove from heat and stir in parmesan cheese and remaining butter.