1. Melt the butter into a liquid state, add whipped cream
2. Add the crumbles grated with lemon zest in advance and mix well
3. Add sugar and mix well
4. Then sift the all-purpose flour, baking powder, salt, and mixed powder into the liquid material
5. Stir until there is no dry powder, add blueberries and mix
6. Use a small spoon to scoop up the batter into a paper mold, put it in the preheated oven at 180 degrees, and bake for 25 minutes
7. The roasted muffins are completely cooled
8. Whipped cream and sugar
9. Add blue, purple and other pigments to adjust the starry sky tone
10. Put the piping mouth into the piping bag, put the light cream of several colors into the bag upright
11. Squeeze the cream on the surface of the muffin and sprinkle some sugar to decorate it
12. Finished picture
Tips:Whipped cream and eggs are best to use lukewarm state, the liquid material after refrigeration will make the butter solidify and not easy to mix
