Cook the bacon in a skillet until crisp, reserving about 1.5 ounces (3 tablespoons) of rendered bacon fat. Let it cool slightly.
Combine the warm bacon fat and vodka in a large jar or sealable container. Stir or swirl to mix.
Let it sit at room temperature for 4–6 hours to infuse.
Freeze overnight. As it chills, the fat will solidify on top.
Skim and strain. Remove the solid fat layer and strain the vodka through a coffee filter or fine mesh sieve lined with cheesecloth.
Store in a sealed jar. It’ll keep at room temperature for several weeks or longer if stored in the fridge.