galletita
cookie
galleta
cookie
+
-ita
diminutive suffix
Galletita means cookie and can be thought of as a small galleta0 (cookie0) with the diminutive1 suffix -ita1, indicating a small or cute cookie.
noun
- cookieA small, sweet biscuit or cookieMe comí una galletita con mi café. // I ate a cookie with my coffee.