Funfetti Cupcakes

Step 1: Set the Anova Sous Vide Precision Cooker to 195ºF (90.6ºC). Generously grease 6 half-pint canning jars with non-stick oil spray or butter. Step 2: Combine 1 stick butter and granulated sugar in the bowl of a stand mixer fitted with a paddle attachment. Beat the mixture on medium-high speed until light and fluffy, 3 to 5 minutes. Step 3: Beat in the egg whites one at a time until combined. Beat in vegetable oil and 1 tablespoon vanilla until smooth. Step 4: In a medium bowl, whisk together flour, baking powder, and a generous 1/4 teaspoon salt. Step 5: With the mixer on low speed, add the flour mixture in 3 additions, alternating with the 1/2 cup milk. End with the flour mixture and mix until just combined. Step 6: Add 1 jar (1/3 cup) sprinkles and mix until just combined. Step 7: Divide the batter between the prepared jars. Each jar should be no more than half full. Wipe off sides and tops of jars using a damp towel. Firmly tap jars on the counter to remove air bubbles. Step 8: Place lids and bands on jars and seal until just tight (do not over-tighten jars; air will still need to escape). Place jars in water bath and set the timer for 3 hours.

Finishing Steps Step 1: When the timer goes off, remove the jars from the water bath. Place on a cooling rack. Carefully remove the lids. Let the cakes cool to room temperature. Step 2: Meanwhile, prepare the frosting: Combine remaining 2 sticks butter and confectioner's sugar in the bowl of a stand mixer fitted with a paddle attachment. Beat the mixture on medium-high speed until light and fluffy, 3 to 5 minutes. Step 3: Add remaining tablespoon milk, remaining 1/2 teaspoon vanilla, and a pinch of salt. Continue to beat on high speed until mixture is very light in color and fluffy, 3 to 5 more minutes. Reduce speed to medium-low and add 2 tablespoons sprinkles. Mix to combine. Step 4: When the cakes are cool, run a knife around the sides of the jars and carefully un-mold cakes. Using a very sharp knife, slice each cake in half horizontally to form cupcakes. Transfer to a serving platter and pipe frosting on top of each cupcake. Top with remaining sprinkles. Serve.

From https://recipes.anovaculinary.com/recipe/sous-vide-funfetti-cupcakes