blender mushroom 2

shift + right click to change origin on top of hat

add a cube

s to scale, ctrl + 2 to subdivide, r to rotate

set snap to face, enable align rotation to target, project individual elements

Alt + d to duplicate bumps, s to scale

select all, shift right click to set origin, right click + p set parent

alt d to duplicate mushroom, move, rotate

reference:

https://www.youtube.com/watch?v=Ar0aLdXhEK0