Step 1

Begin by mixing 1 envelope of about 2 1/2 tsp gelatin in a bowl with 1/4 cup of water. Set aside to let it bloom while you begin the glaze.

Step 2

Pour 1 1/2 cups of granulated sugar, 3/4 cup of water, and 2/3 cup sweetened condensed milk in a heatproof bowl.

Step 3

Heat for 90 seconds on high power in the microwave.

Step 4

Remove the mixture and stir the mixture. Pour in the bloomed gelatin, and whisk until the gelatin is fully dissolved.

Step 5

Melt the white chocolate chips in microwave by heating it in 30 second intervals, stirring between each interval. Once the white chocolate is fully melted, pour the chocolate into the warm gelatin mixture.

Step 6

Carefully whisk mixture until fully combined. Pour through a sieve to remove any chunks of unmelted chocolate or stubborn bits of gelatin.

Step 7

Continue to stir occasionally (to prevent a skin from forming), until the glaze has reached 90 degrees, or is just slightly warm to the touch.

Step 8

Divide the glaze evenly between four bowls. Color them different shades using gel food coloring. To create this galaxy mirror glaze, color them blue, purple, black, and pink.

Step 9

Pour each color of glaze back into one large bowl, alternating colors and drizzling the colors together as you pour them.

Step 10

Place a chilled buttercream cake (in the freezer at least 10 minutes or the fridge for 1 hour) on top of a circular object smaller than the cake board, and set this on top of large baking sheet to catch the run-off glaze.

Step 11

Begin pouring the glaze onto the center of the cake, then slowly work out to the edges of the cake in a circular motion until the cake is fully covered.

Step 12

Let the glaze continue to drip for about 10 minutes then scrape away excess glaze from the bottom of the cake board using a small offset spatula.