<human>: Goal: Make Keto buttercream

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- 8 oz. unsalted butter, at room temperature    2 tsp vanilla extract    1½ tsp ground cinnamon    1 - 2 tsp erythritol (optional)    Brown ¼ of the butter in a small sauce pan until it turns amber in color, but without burning it.    Pour the browned butter in a glass of milk and whisk in the rest of the butter bit by bit with a hand mixer until fluffy.    Add cinnamon and optional sweetener towards the end.
- 8 oz. unsalted butter, at room temperature    2 tsp vanilla extract    1½ tsp ground cinnamon    1 - 2 tsp erythritol (optional)    Brown ¼ of the butter in a small sauce pan until it turns amber in color, but without burning it.    Pour the browned butter in a beaker and whisk in the rest of the butter bit by bit with a hand mixer until fluffy.    Add cinnamon and optional sweetener towards the end.
<bot>: 8 oz. unsalted butter, at room temperature    2 tsp vanilla extract    1½ tsp ground cinnamon    1 - 2 tsp erythritol (optional)    Brown ¼ of the butter in a small sauce pan until it turns amber in color, but without burning it.    Pour the browned butter in a beaker and whisk in the rest of the butter bit by bit with a hand mixer until fluffy.    Add cinnamon and optional sweetener towards the end.