Go back to the original document and go to Edit > Paste to paste the copied biscuit texture.
Place the pasted layer inside the letter's group on top of the Text and Stroke group. Then, right-click the biscuit texture layer, and choose Create Clipping Mask.
Press Command-T to enter Free Transform Mode, and resize and rotate the texture until you like how it looks.
Hit Return to commit the changes.
6. How to Contract a Selection
Command-click the text layer's thumbnail to create a selection.
Go to Select > Modify > Contract, and change the Contract By value to 5.
Create a new layer at the top of the letter's group and name it Glaze 01.
Fill the selection with White, and press Command-D to deselect.
Duplicate the Glaze 01 layer and name the copy Glaze 02, and change the copy's Fill value to 0.
Place both glaze layers in a group and name it Glaze.