1. The general rule:
2. Losing appearance:

The general rule follows that a Ha’adama or Haeitz fruit or vegetable only retains its blessing if it is eaten in its normal way. Now, being that fruits and vegetables are usually eaten in their whole and intact form therefore, if they are grounded in a way that they lose their appearance, then they are demoted from their blessing and become Shehakol. This is with exception to a case in which the disintegrated state of eating is the normal way of eating the fruit require.

1. Derech Achilasam:[1]

If it is the normal and common way of eating a certain fruit or vegetable to grind them or to cook them and have it disintegrate, then it retains its original blessing even if the fruits are no longer recognizable. [This, however, only applies if it is common to eat the food plain, without other foods. If, however, one only eats it together with other foods then its blessing is Shehakol.[2]]

[1] See Seder 7:22; 7:10; Luach 10:24; Admur 202:17; M”A 202:18; Terumas Hadeshen 29; Maharik 43

[2] Piskeiy Teshuvos 202:22