The present invention relates to a process for preparing a food matrix saturated with gas at a pressure higher than atmospheric pressure comprising the following steps: (a) introducing a deformable food matrix containing a gaseous phase, at the start or during the formation of said gas phase in said food matrix, in a substantially non-deformable and hermetic container provided with an opening / closing system, (b) sealing said container hermetically, and (c) allowing said gas phase to form occur in said food matrix within said hermetically sealed container to saturate said food matrix at a pressure higher than atmospheric pressure. The present invention also relates to a method for preparing a honeycombed food matrix, comprising the following steps: (a) preparing a food matrix saturated with gas at a pressure higher than atmospheric pressure according to the method defined above, (b) open said container, this causing the formation of cells in the food matrix and the variation in volume of said food matrix.
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